Michalski, Ryszard S.McCormick, Bruce H.2006-11-062006-11-061971-05-03Michalski, R. S. and McCormick, B. H, "Interval Generalization of Switching Theory," Report No. 442, Department of Computer Science, University of Illinois, Urbana, May 3, 1971.https://hdl.handle.net/1920/1510798 bytes6686540 bytestext/xmlapplication/pdfen-USTechnical report