TY  - JOUR
AU  - V. V. Val'kov
TI  - Unitary transformations of the group~$U(N)$ and diagonalization of multilevel Hamiltonians
JO  - Teoretičeskaâ i matematičeskaâ fizika
PY  - 1988
SP  - 143
EP  - 152
VL  - 76
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TMF_1988_76_1_a11/
LA  - ru
ID  - TMF_1988_76_1_a11
ER  -