%0 Journal Article
%A Sochor, Antonín
%T Real classes in the ultrapower of hereditarily finite sets
%J Commentationes Mathematicae Universitatis Carolinae
%D 1975
%P 637-640
%V 16
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1975__16_4_a2/
%G en
%F CMUC_1975__16_4_a2