TY  - JOUR
AU  - M. D. Kovalev
TI  - A~characteristic property of a~disc
JO  - Informatics and Automation
PY  - 1980
SP  - 124
EP  - 137
VL  - 152
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1980_152_a6/
LA  - ru
ID  - TRSPY_1980_152_a6
ER  -