TY  - JOUR
AU  - B. V. Yusin
TI  - Proof of a variational relation between the coefficients of the

JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1978
SP  - 223
EP  - 224
VL  - 33
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1978_33_1_a21/
LA  - en
ID  - RM_1978_33_1_a21
ER  -