TY  - JOUR
AU  - M. Utepbergenov
TI  - A method for studying regular singularities of partial differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 499
EP  - 505
VL  - 25
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_3_a13/
LA  - ru
ID  - DE_1989_25_3_a13
ER  -