TY  - JOUR
AU  - S. M. Grudskii
TI  - Factorization of $u$-periodic matrix-functions and problems with
JO  - Doklady Akademii Nauk
PY  - 1987
SP  - 1298
EP  - 1302
VL  - 295
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1987_295_6_a2/
LA  - ru
ID  - DAN_1987_295_6_a2
ER  -