TY - JOUR AU - O. F. Men'shikh TI - Letter to the editors: ``Functionally invariant solutions of second order quasilinear partial differential equations'' (Differencial'nye Uravnenija \textbf{11} (1975), 533--540) JO - Differencialʹnye uravneniâ PY - 1976 SP - 183 VL - 12 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1976_12_1_a24/ LA - ru ID - DE_1976_12_1_a24 ER -