TY  - JOUR
AU  - L.N. Shevrin
AU  - A.J. Ovsyannikov
TI  - Semigroups and their subsemigroup lattices.
JO  - Semigroup forum
PY  - 1983
SP  - 1
EP  - 154
VL  - 27
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1983__27_134621/
ID  - SF_1983__27_134621
ER  -