TY  - JOUR
AU  - E. K. Ershov
TI  - The dependence on the parameter of the structure of the solutions on a toroidal invariant surface
JO  - Differencialʹnye uravneniâ
PY  - 1978
SP  - 919
EP  - 921
VL  - 14
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1978_14_5_a18/
LA  - ru
ID  - DE_1978_14_5_a18
ER  -