TY - JOUR AU - L. G. Mikhailov TI - On the theory of total differentials with singular points JO - Doklady Akademii Nauk PY - 1992 SP - 646 EP - 650 VL - 322 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1992_322_4_a3/ LA - ru ID - DAN_1992_322_4_a3 ER -