TY  - JOUR
AU  - E. G. Zelkin
TI  - Transformation of partial differential equations with nonseparable variables into a system of two ordinary differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 1081
EP  - 1084
VL  - 27
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_6_a24/
LA  - ru
ID  - DE_1991_27_6_a24
ER  -