TY  - JOUR
AU  - A. A. Abramov
AU  - V. I. Ul'yanova
AU  - L. F. Yukhno
TI  - The argument principle in a spectral problem for systems of ordinary differential equations with singularities
JO  - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki
PY  - 1998
SP  - 61
EP  - 67
VL  - 38
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZVMMF_1998_38_1_a7/
LA  - ru
ID  - ZVMMF_1998_38_1_a7
ER  -