TY - JOUR AU - Wenjie Gao AU - Junyu Wang TI - On a nonlinear second order periodic boundaryvalue problem with Carathéodory functions JO - Annales Polonici Mathematici PY - 1995 SP - 283 EP - 291 VL - 62 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-62-3-283-291/ DO - 10.4064/ap-62-3-283-291 LA - en ID - 10_4064_ap_62_3_283_291 ER -