%0 Journal Article
%A Le Van Linh
%A A. P. Sadovskii
%T The centre-focus problem for analytical systems of Lienard form in degenerate case
%J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica
%D 2003
%P 37-50
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/BASM_2003_2_a3/
%G en
%F BASM_2003_2_a3