Bergadano, FrancescoMatwin, StanMichalski, Ryszard S.Zhang, Jianping2006-11-092006-11-091988-11Bergadano, F., Matwin, S., Michalski, R. S. and Zhang, J., "Learning Two-Tiered Descriptions of Flexible Concepts: A Method Employing Examples of Varied Typicality and A Two-staged Construction of the Base Concept Representation Part I: Principles and Methodology," Reports of the Machine Learning and Inference Laboratory, MLI-88-6, School of Information Technology and Engineering, George Mason University, Fairfax, VA, November 1988.https://hdl.handle.net/1920/16241499658 bytesapplication/pdfen-USTechnical report