TY  - JOUR
AU  - V. V. Volchkov
TI  - Two-radii theorems on spaces of constant curvature
JO  - Doklady Akademii Nauk
PY  - 1996
SP  - 300
EP  - 302
VL  - 347
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1996_347_3_a2/
LA  - ru
ID  - DAN_1996_347_3_a2
ER  -