%0 Journal Article
%A Rachůnková, Irena
%T The first kind periodic solutions of differential equations of the second order
%J Mathematica slovaca
%D 1989
%P 407-415
%V 39
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MASLO_1989__39_4_a6/
%G en
%F MASLO_1989__39_4_a6