TY  - JOUR
AU  - R. A. DeMarr
TI  - Transformations in semi-groups and multi-valued mappings
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 968
EP  - 970
VL  - 144
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_144_5_a5/
LA  - ru
ID  - DAN_1962_144_5_a5
ER  -