TY  - JOUR
AU  - V. N. Strakhov
TI  - Variational methods in the theory of linear transformations of
JO  - Doklady Akademii Nauk
PY  - 1990
SP  - 63
EP  - 67
VL  - 312
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1990_312_1_a13/
LA  - ru
ID  - DAN_1990_312_1_a13
ER  -