%0 Journal Article
%A Jaume Giné
%A Jaume Llibre
%T Criteria for the nonexistence of periodic orbits in planar differential systems
%J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica
%D 2023
%P 3-7
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/BASM_2023_1_a0/
%G en
%F BASM_2023_1_a0