TY - JOUR AU - L. V. Ovsyannikov TI - Regular and nonregular partially invariant solutions JO - Doklady Akademii Nauk PY - 1995 SP - 156 EP - 159 VL - 343 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1995_343_2_a2/ LA - ru ID - DAN_1995_343_2_a2 ER -