TY - JOUR AU - V. S. Kozlova TI - Singular points of first degree of non-roughness situated on the line of discontinuity of the right-hand sides of a system JO - Differencialʹnye uravneniâ PY - 1985 SP - 334 EP - 335 VL - 21 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1985_21_2_a22/ LA - ru ID - DE_1985_21_2_a22 ER -