%0 Journal Article
%A Zanolin, Fabio
%T Periodic solutions for second order differential systems with damping
%J Rendiconti del Seminario Matematico della Università di Padova
%D 1981
%P 223-234
%V 65
%I Seminario Matematico of the University of Padua
%U http://www.numdam.org/item/RSMUP_1981__65__223_0/
%G en
%F RSMUP_1981__65__223_0