%0 Journal Article
%A J. Węgrzyn
%T Differential equations with infinite number of limit cycles
%J Applicationes Mathematicae
%D 1971
%P 391-395
%V 12
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/am-12-4-391-395/
%R 10.4064/am-12-4-391-395
%G en
%F 10_4064_am_12_4_391_395