TY  - JOUR
AU  - S. I. Trifonov
TI  - Analytic families of differential equations on two-dimensional
JO  - Doklady Akademii Nauk
PY  - 1993
SP  - 559
EP  - 562
VL  - 331
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1993_331_5_a8/
LA  - ru
ID  - DAN_1993_331_5_a8
ER  -