TY  - JOUR
AU  - M. D. Kovalev
TI  - On~a~characteristic property of the disc and the~$n$-ball
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1981
SP  - 187
EP  - 188
VL  - 36
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1981_36_6_a14/
LA  - en
ID  - RM_1981_36_6_a14
ER  -