%0 Journal Article %A Moauro, Vinicio %T Bifurcation of closed orbits from a limit cycle in $R^2$ %J Rendiconti del Seminario Matematico della Università di Padova %D 1981 %P 277-291 %V 65 %I Seminario Matematico of the University of Padua %U http://archive.numdam.org/item/RSMUP_1981__65__277_0/ %G en %F RSMUP_1981__65__277_0