%0 Journal Article %A W. Marek %A Paweł Zbierski %T On the number of models of the Kelley-Morse theory of classes %J Fundamenta Mathematicae %D 1980 %P 169-173 %V 109 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-109-3-169-173/ %R 10.4064/fm-109-3-169-173 %G en %F 10_4064_fm_109_3_169_173