TY  - JOUR
AU  - N. P. Erugin
TI  - Theory of moving singular points of second order equations.~I
JO  - Differencialʹnye uravneniâ
PY  - 1976
SP  - 387
EP  - 416
VL  - 12
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1976_12_3_a0/
LA  - ru
ID  - DE_1976_12_3_a0
ER  -