TY  - JOUR
AU  - R. Dacić
TI  - Group and hypergroup operations induced by multivalued functions
JO  - Matematički vesnik
PY  - 1969
SP  - 463 
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MV_1969_21_4_a19/
ID  - MV_1969_21_4_a19
ER  -