TY - JOUR AU - S. N. Markov TI - Singularities of solutions of second-order systems in a real domain JO - Differencialʹnye uravneniâ PY - 1983 SP - 1993 EP - 1995 VL - 19 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1983_19_11_a24/ LA - ru ID - DE_1983_19_11_a24 ER -