TY - JOUR AU - S. G. Kondratenya AU - A. I. Yablonskii TI - Conditions for the existence of solutions with singular initial conditions of a nonlinear system of two differential equations JO - Differencialʹnye uravneniâ PY - 1973 SP - 1765 EP - 1773 VL - 9 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1973_9_10_a2/ LA - ru ID - DE_1973_9_10_a2 ER -