TY - JOUR AU - Krystyna Szafraniec TI - A difference method for a system of second order ordinary differential equations JO - Annales Polonici Mathematici PY - 1989 SP - 1 EP - 10 VL - 50 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-50-1-1-10/ DO - 10.4064/ap-50-1-1-10 LA - en ID - 10_4064_ap_50_1_1_10 ER -