TY  - JOUR
AU  - I. S. Kukles
AU  - L. B. Persidskaya
TI  - On extending Frommer's method of investigation of a~singular point to a~system of three differential equations
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1968
SP  - 44
EP  - 54
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1968_9_a5/
LA  - ru
ID  - IVM_1968_9_a5
ER  -