TY  - JOUR
AU  - E. S. Lyapin
TI  - Independence of subsemigroups of a semigroup
JO  - Doklady Akademii Nauk
PY  - 1969
SP  - 1229
EP  - 1231
VL  - 185
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1969_185_6_a6/
LA  - ru
ID  - DAN_1969_185_6_a6
ER  -