\begin{thebibliography}{}

\bibitem[\protect\BCAY{Ahn \BBA\ Medin}{Ahn \BBA\ Medin}{1989}]{ahn89}
Ahn, W.\BBACOMMA\  \BBA\ Medin, D.~L. \BBOP1989\BBCP.
\newblock \BBOQ A two-stage categorization model of family resemblance
  sorting.\BBCQ\
\newblock In {\Bem Proceedings of the Eleventh Annual Conference of the
  Cognitive Science Society}, \BPGS\ 315--322. Ann Arbor, MI: Lawrence Erlbaum.

\bibitem[\protect\BCAY{Anderson \BBA\ Matessa}{Anderson \BBA\
  Matessa}{1991}]{anderson91}
Anderson, J.~R.\BBACOMMA\  \BBA\ Matessa, M. \BBOP1991\BBCP.
\newblock \BBOQ An iterative Bayesian algorithm for categorization\BBCQ\
\newblock In Fisher, D., Pazzani, M., \BBA\ Langley, P.\BEDS, {\Bem Concept
  formation: Knowledge and Experience in Unsupervised Learning}. San Mateo, CA:
  Morgan Kaufmann.

\bibitem[\protect\BCAY{Biswas, Weinberg, \BBA\ Li}{Biswas
  et~al.}{1994}]{biswas94}
Biswas, G., Weinberg, J., \BBA\ Li, C. \BBOP1994\BBCP.
\newblock \BBOQ {\sc Iterate}: A conceptual clustering method for knowledge
  discovery in databases\BBCQ\
\newblock In Braunschweig, B.\BBACOMMA\  \BBA\ Day, R.\BEDS, {\Bem Innovative
  Applications of Artificial Intelligence in the Oil and Gas Industry}.
  Editions Technip.

\bibitem[\protect\BCAY{Biswas, Weinberg, Yang, \BBA\ Koller}{Biswas
  et~al.}{1991}]{biswas91}
Biswas, G., Weinberg, J.~B., Yang, Q., \BBA\ Koller, G.~R. \BBOP1991\BBCP.
\newblock \BBOQ Conceptual clustering and exploratory data analysis\BBCQ\
\newblock In {\Bem Proceedings of the Eighth International Machine Learning
  Workshop}, \BPGS\ 591--595. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Carpineto \BBA\ Romano}{Carpineto \BBA\
  Romano}{1993}]{carpineto93}
Carpineto, C.\BBACOMMA\  \BBA\ Romano, G. \BBOP1993\BBCP.
\newblock \BBOQ {\sc Galois}: An order-theoretic approach to conceptual
  clustering\BBCQ\
\newblock In {\Bem Proceedings of the Tenth International Conference on Machine
  Learning}, \BPGS\ 33--40. Amherst, MA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Cheeseman, Kelly, Self, Stutz, Taylor, \BBA\
  Freeman}{Cheeseman et~al.}{1988}]{cheeseman88}
Cheeseman, P., Kelly, J., Self, M., Stutz, J., Taylor, W., \BBA\ Freeman, D.
  \BBOP1988\BBCP.
\newblock \BBOQ {\sc AutoClass}: A Bayesian classification system\BBCQ\
\newblock In {\Bem Proceedings of the Fifth International Machine Learning
  Conference}, \BPGS\ 54--64. Ann Arbor, MI: Morgan Kaufmann.

\bibitem[\protect\BCAY{Corter \BBA\ Gluck}{Corter \BBA\ Gluck}{1992}]{corter92}
Corter, J.\BBACOMMA\  \BBA\ Gluck, M. \BBOP1992\BBCP.
\newblock \BBOQ Explaining basic categories: feature predictability and
  information\BBCQ\
\newblock {\Bem Psychological Bulletin}, {\Bem 111}, 291--303.

\bibitem[\protect\BCAY{De~Alte Da~Veiga}{De~Alte Da~Veiga}{1994}]{dealte94}
De~Alte Da~Veiga, F. \BBOP1994\BBCP.
\newblock {\Bem Data Analysis in Biomedical Research: A Novel Methodological
  Approach and its Implementation as a Conceptual Clustering Algorithm (in
  Portuguese)}.
\newblock Ph.D.\ thesis, Universidade de Coimbra, Unidade de Biomatem\'{a}tica
  e Inform\'{a}tica M\'{e}dica da Faculdade de Medicina.

\bibitem[\protect\BCAY{Decaestecker}{Decaestecker}{1991}]{decaestecker91}
Decaestecker, C. \BBOP1991\BBCP.
\newblock \BBOQ Description contrasting in incremental concept formation\BBCQ\
\newblock In Kodratoff, Y.\BED, {\Bem Machine Learning -- EWSL-91, No. 482,
  Lecture Notes in Artificial Intelligence}, \BPGS\ 220--233. Springer-Verlag.

\bibitem[\protect\BCAY{Devaney \BBA\ Ram}{Devaney \BBA\ Ram}{1993}]{devaney93}
Devaney, M.\BBACOMMA\  \BBA\ Ram, A. \BBOP1993\BBCP.
\newblock \BBOQ Personal communication, oct. 1993\BBCQ.

\bibitem[\protect\BCAY{Duda \BBA\ Hart}{Duda \BBA\ Hart}{1973}]{duda73}
Duda, R.~O.\BBACOMMA\  \BBA\ Hart, P.~E. \BBOP1973\BBCP.
\newblock {\Bem Pattern Classification and Scene Analysis}.
\newblock New York, NY: Wiley and Sons.

\bibitem[\protect\BCAY{Everitt}{Everitt}{1981}]{everitt81}
Everitt, B. \BBOP1981\BBCP.
\newblock {\Bem Cluster Analysis}.
\newblock London: Heinemann.

\bibitem[\protect\BCAY{Fayyad}{Fayyad}{1991}]{fayyad91}
Fayyad, U. \BBOP1991\BBCP.
\newblock {\Bem On the Induction of Decision Trees for Multiple Concept
  Learning}.
\newblock Ph.D.\ thesis, University of Michigan, Ann Arbor, MI: Department of
  Computer Science and Engineering.

\bibitem[\protect\BCAY{Fisher}{Fisher}{1995}]{fisher95}
Fisher, D. \BBOP1995\BBCP.
\newblock \BBOQ Optimization and simplification of hierarchical
  clusterings\BBCQ\
\newblock In {\Bem Proceedings of the First International Conference on
  Knowledge Discovery and Data Mining}, \BPGS\ 118--123. Menlo Park, CA: AAAI
  Press.

\bibitem[\protect\BCAY{Fisher \BBA\ Hapanyengwi}{Fisher \BBA\
  Hapanyengwi}{1993}]{fisher93a}
Fisher, D.\BBACOMMA\  \BBA\ Hapanyengwi, G. \BBOP1993\BBCP.
\newblock \BBOQ Database management and analysis tools of machine
  induction\BBCQ\
\newblock {\Bem Journal of Intelligent Information Systems}, {\Bem 2}, 5--38.

\bibitem[\protect\BCAY{Fisher, Xu, Carnes, Reich, Fenves, Chen, Shiavi, Biswas,
  \BBA\ Weinberg}{Fisher et~al.}{1993}]{fisher93b}
Fisher, D., Xu, L., Carnes, J., Reich, Y., Fenves, S., Chen, J., Shiavi, R.,
  Biswas, G., \BBA\ Weinberg, J. \BBOP1993\BBCP.
\newblock \BBOQ Applying AI clustering to engineering tasks\BBCQ\
\newblock {\Bem IEEE Expert}, {\Bem 8}, 51--60.

\bibitem[\protect\BCAY{Fisher, Xu, \BBA\ Zard}{Fisher et~al.}{1992}]{fisher92}
Fisher, D., Xu, L., \BBA\ Zard, N. \BBOP1992\BBCP.
\newblock \BBOQ Ordering effects in clustering\BBCQ\
\newblock In {\Bem Proceedings of the Ninth International Conference on Machine
  Learning}, \BPGS\ 163--168. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Fisher}{Fisher}{1987a}]{fisher87a}
Fisher, D.~H. \BBOP1987a\BBCP.
\newblock \BBOQ Knowledge acquisition via incremental conceptual
  clustering\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 2}, 139--172.

\bibitem[\protect\BCAY{Fisher}{Fisher}{1987b}]{fisher87b}
Fisher, D.~H. \BBOP1987b\BBCP.
\newblock {\Bem Knowledge Acquisition via Incremental Conceptual Clustering}.
\newblock Ph.D.\ thesis, University of California, Irvine, CA: Department of
  Information and Computer Science.

\bibitem[\protect\BCAY{Fisher}{Fisher}{1989}]{fisher89}
Fisher, D.~H. \BBOP1989\BBCP.
\newblock \BBOQ Noise-tolerant conceptual clustering\BBCQ\
\newblock In {\Bem Proceedings of the International Joint Conference Artificial
  Intelligence}, \BPGS\ 825--830. Detroit, MI: Morgan Kaufmann.

\bibitem[\protect\BCAY{Fisher \BBA\ Langley}{Fisher \BBA\
  Langley}{1990}]{fisher90}
Fisher, D.~H.\BBACOMMA\  \BBA\ Langley, P. \BBOP1990\BBCP.
\newblock \BBOQ The structure and formation of natural categories\BBCQ\
\newblock In Bower, G.~H.\BED, {\Bem The Psychology of Learning and
  Motivation}, \lowercase{\BVOL}~25. San Diego, CA: Academic Press.

\bibitem[\protect\BCAY{Fisher \BBA\ Schlimmer}{Fisher \BBA\
  Schlimmer}{1988}]{fisher88}
Fisher, D.~H.\BBACOMMA\  \BBA\ Schlimmer, J. \BBOP1988\BBCP.
\newblock \BBOQ Concept simplification and prediction accuracy\BBCQ\
\newblock In {\Bem Proceedings of the Fifth International Conference on Machine
  Learning}, \BPGS\ 22--28. Ann Arbor, MI: Morgan Kaufmann.

\bibitem[\protect\BCAY{Gennari}{Gennari}{1989}]{gennari89a}
Gennari, J. \BBOP1989\BBCP.
\newblock \BBOQ Focused concept formation\BBCQ\
\newblock In {\Bem Proceedings of the Sixth International Workshop on Machine
  Learning}, \BPGS\ 379--382. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Gennari, Langley, \BBA\ Fisher}{Gennari
  et~al.}{1989}]{gennari89b}
Gennari, J., Langley, P., \BBA\ Fisher, D. \BBOP1989\BBCP.
\newblock \BBOQ Models of incremental concept formation\BBCQ\
\newblock {\Bem Artificial Intelligence}, {\Bem 40}, 11--62.

\bibitem[\protect\BCAY{Gluck \BBA\ Corter}{Gluck \BBA\ Corter}{1985}]{gluck85}
Gluck, M.~A.\BBACOMMA\  \BBA\ Corter, J.~E. \BBOP1985\BBCP.
\newblock \BBOQ Information, uncertainty, and the utility of categories\BBCQ\
\newblock In {\Bem Proceedings of the Seventh Annual Conference of the
  Cognitive Science Society}, \BPGS\ 283--287. Hillsdale, NJ: Lawrence Erlbaum.

\bibitem[\protect\BCAY{Hadzikadic \BBA\ Yun}{Hadzikadic \BBA\
  Yun}{1989}]{hadzikadic89}
Hadzikadic, M.\BBACOMMA\  \BBA\ Yun, D. \BBOP1989\BBCP.
\newblock \BBOQ Concept formation by incremental conceptual clustering\BBCQ\
\newblock In {\Bem Proceedings of the International Joint Conference Artificial
  Intelligence}, \BPGS\ 831--836. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Hanson, Stutz, \BBA\ Cheeseman}{Hanson
  et~al.}{1991}]{hanson91}
Hanson, R., Stutz, J., \BBA\ Cheeseman, P. \BBOP1991\BBCP.
\newblock \BBOQ Bayesian classification with correlation and inheritance\BBCQ\
\newblock In {\Bem Proceedings of the 12th International Joint Conference on
  Artificial Intelligence}, \BPGS\ 692--698. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Iba}{Iba}{1989}]{iba89}
Iba, G. \BBOP1989\BBCP.
\newblock \BBOQ A heuristic approach to the discovery of macro operators\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 3}, 285--317.

\bibitem[\protect\BCAY{Iba \BBA\ Gennari}{Iba \BBA\ Gennari}{1991}]{iba91}
Iba, W.\BBACOMMA\  \BBA\ Gennari, J. \BBOP1991\BBCP.
\newblock \BBOQ Learning to recognize movements\BBCQ\
\newblock In Fisher, D., Pazzani, M., \BBA\ Langley, P.\BEDS, {\Bem Concept
  Formation: Knowledge and Experience in Unsupervised Learning}. San Mateo, CA:
  Morgan Kaufmann.

\bibitem[\protect\BCAY{Ketterlin, Gancarski, \BBA\ Korczak}{Ketterlin
  et~al.}{1995}]{ketterlin95}
Ketterlin, A., Gan\c{c}arski, P., \BBA\ Korczak, J. \BBOP1995\BBCP.
\newblock \BBOQ Hierarchical clustering of composite objects with a variable
  number of components\BBCQ\
\newblock In {\Bem Preliminary papers of the Fifth International Workshop on
  Artificial Intelligence and Statistics}, \BPGS\ 303--309.

\bibitem[\protect\BCAY{Kilander}{Kilander}{1994}]{kilander94}
Kilander, F. \BBOP1994\BBCP.
\newblock {\Bem Incremental Conceptual Clustering in an On-Line Application}.
\newblock Ph.D.\ thesis, Stockholm University, Stockholm, Sweden: Department of
  Computer and Systems Sciences.

\bibitem[\protect\BCAY{Kolodner}{Kolodner}{1983}]{kolodner83}
Kolodner, J.~L. \BBOP1983\BBCP.
\newblock \BBOQ Reconstructive memory: A computer model\BBCQ\
\newblock {\Bem Cognitive Science}, {\Bem 7}, 281--328.

\bibitem[\protect\BCAY{Lebowitz}{Lebowitz}{1982}]{lebowitz82}
Lebowitz, M. \BBOP1982\BBCP.
\newblock \BBOQ Correcting erroneous generalizations\BBCQ\
\newblock {\Bem Cognition and Brain Theory}, {\Bem 5}, 367--381.

\bibitem[\protect\BCAY{Lebowitz}{Lebowitz}{1987}]{lebowitz87}
Lebowitz, M. \BBOP1987\BBCP.
\newblock \BBOQ Experiments with incremental concept formation: {\sc
  Unimem}\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 2}, 103--138.

\bibitem[\protect\BCAY{Levinson}{Levinson}{1984}]{levinson84}
Levinson, R. \BBOP1984\BBCP.
\newblock \BBOQ A self-organizing retrieval system for graphs\BBCQ\
\newblock In {\Bem Proceedings of the National Conference on Artificial
  Intelligence}, \BPGS\ 203--206. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Lopez~de Mantaras}{Lopez~de Mantaras}{1991}]{mantaras91}
Lopez~de Mantaras, R. \BBOP1991\BBCP.
\newblock \BBOQ A distance-based attribute selection measure for decision tree
  induction\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 6}, 81--92.

\bibitem[\protect\BCAY{Martin \BBA\ Billman}{Martin \BBA\
  Billman}{1994}]{martin94}
Martin, J.\BBACOMMA\  \BBA\ Billman, D. \BBOP1994\BBCP.
\newblock \BBOQ Acquiring and combining overlapping concepts\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 16}, 121--155.

\bibitem[\protect\BCAY{McKusick \BBA\ Langley}{McKusick \BBA\
  Langley}{1991}]{mckusick91}
McKusick, K.\BBACOMMA\  \BBA\ Langley, P. \BBOP1991\BBCP.
\newblock \BBOQ Constraints on tree structure in concept formation\BBCQ\
\newblock In {\Bem Proceedings of the International Joint Conference on
  Artificial Intelligence}, \BPGS\ 810--816. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{McKusick \BBA\ Thompson}{McKusick \BBA\
  Thompson}{1990}]{mckusick90}
McKusick, K.\BBACOMMA\  \BBA\ Thompson, K. \BBOP1990\BBCP.
\newblock {\Bem {\sc Cobweb/3}: A portable implementation (Tech. Rep. No.
  FIA-90-6-18-2)}.
\newblock Moffett Field, CA: AI Research Branch, NASA Ames Research Center.

\bibitem[\protect\BCAY{Medin}{Medin}{1983}]{medin83}
Medin, D. \BBOP1983\BBCP.
\newblock \BBOQ Structural principles of categorization\BBCQ\
\newblock In Tighe, T.\BBACOMMA\  \BBA\ Shepp, B.\BEDS, {\Bem Perception,
  Cognition, and Development}, \BPGS\ 203--230. Hillsdale, NJ: Lawrence
  Erlbaum.

\bibitem[\protect\BCAY{Michalski \BBA\ Stepp}{Michalski \BBA\
  Stepp}{1983a}]{michalski83a}
Michalski, R.~S.\BBACOMMA\  \BBA\ Stepp, R. \BBOP1983a\BBCP.
\newblock \BBOQ Automated construction of classifications: conceptual
  clustering versus numerical taxonomy\BBCQ\
\newblock {\Bem IEEE Transactions on Pattern Analysis and Machine
  Intelligence}, {\Bem 5}, 219--243.

\bibitem[\protect\BCAY{Michalski \BBA\ Stepp}{Michalski \BBA\
  Stepp}{1983b}]{michalski83b}
Michalski, R.~S.\BBACOMMA\  \BBA\ Stepp, R. \BBOP1983b\BBCP.
\newblock \BBOQ Learning from observation: conceptual clustering\BBCQ\
\newblock In Michalski, R.~S., Carbonell, J.~G., \BBA\ Mitchell, T.~M.\BEDS,
  {\Bem Machine Learning: An Artificial Intelligence Approach}. San Mateo, CA:
  Morgan Kaufmann.

\bibitem[\protect\BCAY{Mingers}{Mingers}{1989a}]{mingers89b}
Mingers, J. \BBOP1989a\BBCP.
\newblock \BBOQ An empirical comparison of pruning methods for decision-tree
  induction\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 4}, 227--243.

\bibitem[\protect\BCAY{Mingers}{Mingers}{1989b}]{mingers89a}
Mingers, J. \BBOP1989b\BBCP.
\newblock \BBOQ An empirical comparison of selection measures for decision-tree
  induction\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 3}, 319--342.

\bibitem[\protect\BCAY{Nevins}{Nevins}{1995}]{nevins95}
Nevins, A.~J. \BBOP1995\BBCP.
\newblock \BBOQ A branch and bound incremental conceptual clusterer\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 18}, 5--22.

\bibitem[\protect\BCAY{Quinlan}{Quinlan}{1986}]{quinlan86}
Quinlan, J.~R. \BBOP1986\BBCP.
\newblock \BBOQ Induction of decision trees\BBCQ\
\newblock {\Bem Machine Learning}, {\Bem 1}, 81--106.

\bibitem[\protect\BCAY{Quinlan}{Quinlan}{1987}]{quinlan87}
Quinlan, J.~R. \BBOP1987\BBCP.
\newblock \BBOQ Simplifying decision trees\BBCQ\
\newblock {\Bem International Journal of Man-machine Studies}, {\Bem 27},
  221--234.

\bibitem[\protect\BCAY{Quinlan}{Quinlan}{1993}]{quinlan93}
Quinlan, J.~R. \BBOP1993\BBCP.
\newblock {\Bem {\sc C4.5}: Programs for Machine Learning}.
\newblock San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Reich \BBA\ Fenves}{Reich \BBA\ Fenves}{1991}]{reich91}
Reich, Y.\BBACOMMA\  \BBA\ Fenves, S. \BBOP1991\BBCP.
\newblock \BBOQ The formation and use of abstract concepts in design\BBCQ\
\newblock In Fisher, D., Pazzani, M., \BBA\ Langley, P.\BEDS, {\Bem Concept
  Formation: Knowledge and Experience in Unsupervised Learning}. San Mateo, CA:
  Morgan Kaufmann.

\bibitem[\protect\BCAY{Utgoff}{Utgoff}{1994}]{utgoff94}
Utgoff, P. \BBOP1994\BBCP.
\newblock \BBOQ An improved algorithm for incremental induction of decision
  trees\BBCQ\
\newblock In {\Bem Proceedings of the Eleventh International Conference on
  Machine Learning}, \BPGS\ 318--325. San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Wallace \BBA\ Dowe}{Wallace \BBA\
  Dowe}{1994}]{wallace94}
Wallace, C.~S.\BBACOMMA\  \BBA\ Dowe, D.~L. \BBOP1994\BBCP.
\newblock \BBOQ Intrinsic classification by MML - the {\sc Snob} program\BBCQ\
\newblock In {\Bem Proceedings of the 7th Australian Joint Conference on
  Artificial Intelligence}, \BPGS\ 37--44. UNE, Armidale, NSW, Australia: World
  Scientific.

\bibitem[\protect\BCAY{Weiss \BBA\ Kulikowski}{Weiss \BBA\
  Kulikowski}{1991}]{weiss91}
Weiss, S.\BBACOMMA\  \BBA\ Kulikowski, C. \BBOP1991\BBCP.
\newblock {\Bem Computer Systems that Learn}.
\newblock San Mateo, CA: Morgan Kaufmann.

\bibitem[\protect\BCAY{Wilcox \BBA\ Levinson}{Wilcox \BBA\
  Levinson}{1986}]{wilcox86}
Wilcox, C.~S.\BBACOMMA\  \BBA\ Levinson, R.~A. \BBOP1986\BBCP.
\newblock \BBOQ A self-organized knowledge base for recall, design, and
  discovery in organic chemistry\BBCQ\
\newblock In Pierce, T.~H.\BBACOMMA\  \BBA\ Hohne, B.~A.\BEDS, {\Bem Artificial
  Intelligence Applications in Chemistry}. Washington, DC: American Chemical
  Society.

\end{thebibliography}
