TY - JOUR AU - E. M. Vorob'ev TI - Partial symmetries and integrable multidimensional differential equations JO - Differencialʹnye uravneniâ PY - 1989 SP - 461 EP - 465 VL - 25 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1989_25_3_a9/ LA - ru ID - DE_1989_25_3_a9 ER -