%0 Journal Article
%A Bukovský, Lev
%A Butkovičová, Eva
%T Ultrafilter with $\aleph_0$ predecessors in Rudin-Frolík order
%J Commentationes Mathematicae Universitatis Carolinae
%D 1981
%P 429-447
%V 22
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1981__22_3_a0/
%G en
%F CMUC_1981__22_3_a0