TY - JOUR AU - E. A. Ermolaev AU - S. V. Zhestkov AU - V. I. Kuvshinov TI - Classes of exactly solvable degenerate systems of universal nonlinear partial differential equations JO - Differencialʹnye uravneniâ PY - 1997 SP - 845 EP - 846 VL - 33 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1997_33_6_a19/ LA - ru ID - DE_1997_33_6_a19 ER -