TY  - JOUR
AU  - V. A. Gurvich
TI  - Criteria for the nonemptiness of dual cores
JO  - Doklady Akademii Nauk
PY  - 1997
SP  - 159
EP  - 162
VL  - 352
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1997_352_2_a2/
LA  - ru
ID  - DAN_1997_352_2_a2
ER  -