%0 Journal Article %A Guíñez, V. %A Sáez, E. %A Szántó, I. %T Small Amplitude Limit Cycles for Cubic Systems %J Canadian mathematical bulletin %D 1993 %P 54-63 %V 36 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-009-4/ %R 10.4153/CMB-1993-009-4 %F 10_4153_CMB_1993_009_4