%0 Journal Article
%A M. N. Yakovlev
%T Solvability of a periodic boundary-value problem for a system of first-order ordinary differential equations 

%J Zapiski Nauchnykh Seminarov POMI
%D 1998
%P 231-241
%V 248
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1998_248_a12/
%G ru
%F ZNSL_1998_248_a12