TY  - JOUR
AU  - S. S. Marchenkov
TI  - Definition of positively closed classes by endomorphism semigroups
JO  - Diskretnaya Matematika
PY  - 2012
SP  - 19
EP  - 26
VL  - 24
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DM_2012_24_4_a1/
LA  - ru
ID  - DM_2012_24_4_a1
ER  -