TY  - JOUR
AU  - E. S. Lyapin
TI  - Partial groupoids that can be obtained from semigroups by restrictions and homomorphisms
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1989
SP  - 30
EP  - 36
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1989_10_a5/
LA  - ru
ID  - IVM_1989_10_a5
ER  -