TY - JOUR AU - S. G. Kondratenya AU - A. I. Yablonskii TI - The singularities of the solutions of certain systems of differential equations JO - Differencialʹnye uravneniâ PY - 1969 SP - 1321 EP - 1323 VL - 5 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1969_5_7_a17/ LA - ru ID - DE_1969_5_7_a17 ER -