Michalski, Ryszard S.2006-11-142006-11-141991Michalski, R. S., "Concepts as Flexible and Context-dependent Sets: the two-tiered view," George Mason University, Fairfax, VA-22030, 1991.https://hdl.handle.net/1920/16881909992 bytesapplication/pdfen-USConcepts as Flexible and Context-dependent Sets: the two-tiered viewTechnical report