TY  - JOUR
AU  - É. V. Nikol'skii
TI  - Generalized functionally invariant solutions of two-dimensional equations of second order and systems of first order
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 812
EP  - 815
VL  - 250
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_250_4_a11/
LA  - ru
ID  - DAN_1980_250_4_a11
ER  -