TY  - JOUR
AU  - V. P. Shapovalov
TI  - Integration of certain classes of systems of two first order ordinary differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 1154
EP  - 1155
VL  - 9
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_6_a22/
LA  - ru
ID  - DE_1973_9_6_a22
ER  -