TY - JOUR AU - M. P. Kotukhov TI - On some differential properties of solutions of a partial differential equation JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1996 SP - 59 EP - 62 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1996_5_a7/ LA - ru ID - IVM_1996_5_a7 ER -