%0 Journal Article
%A Andrzej Pelc
%T Solution of a problem of Ulam on countable sequences of sets
%J Fundamenta Mathematicae
%D 1981
%P 113-118
%V 114
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-114-2-113-118/
%R 10.4064/fm-114-2-113-118
%G en
%F 10_4064_fm_114_2_113_118