TY  - JOUR
AU  - I. V. Mykytyuk
AU  - A. M. Stepin
TI  - A sufficient condition for reduction by stages: proof and applications
JO  - Sbornik. Mathematics
PY  - 2008
SP  - 663
EP  - 671
VL  - 199
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2008_199_5_a2/
LA  - en
ID  - SM_2008_199_5_a2
ER  -