%0 Journal Article %A Dimitru Cozma %T Center problem for a~class of cubic systems with a~bundle of two invariant straight lines and one invariant conic %J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica %D 2010 %P 51-66 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/BASM_2010_3_a6/ %G en %F BASM_2010_3_a6