TY  - JOUR
AU  - N. V. Grigorenko
TI  - Two problems in the Galois theory of differential fields for the field of formal power series
JO  - Sbornik. Mathematics
PY  - 1980
SP  - 327
EP  - 335
VL  - 37
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/SM_1980_37_3_a1/
LA  - en
ID  - SM_1980_37_3_a1
ER  -