@article{GDZPPN001256238, title = {Semigroups and their subsemigroup lattices.}, journal = {Semigroup forum}, volume = {26}, year = {1983}, pages = {1-154}, zbl = {0523.20037}, url = {http://dml.mathdoc.fr/item/GDZPPN001256238} }
Shevrin, L.N.; Ovsyannikov, A.J. Semigroups and their subsemigroup lattices.. Semigroup forum, Tome 26 (1983) pp. 1-154. http://gdmltest.u-ga.fr/item/GDZPPN001256238/