TY  - JOUR
AU  - A. G. Sergeev
TI  - On two geometric problems arising in mathematical physics
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2015
SP  - 157
EP  - 166
VL  - 20
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2015_20_2_a10/
LA  - ru
ID  - FPM_2015_20_2_a10
ER  -