TY - JOUR AU - B. V. Rusanov TI - Functionally invariant solutions of second-order equations JO - Doklady Akademii Nauk PY - 1965 SP - 534 EP - 537 VL - 161 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1965_161_3_a9/ LA - ru ID - DAN_1965_161_3_a9 ER -