TY - JOUR AU - Gaprindashvili, G. TI - On the periodic boundary-value problem for systems of second-order nonlinear ordinary differential equations. JO - Georgian Mathematical Journal PY - 1995 SP - 21 EP - 36 VL - 2 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/GMJ_1995__2_1_47274/ LA - en ID - GMJ_1995__2_1_47274 ER -