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@article{SF_1979__18_134348, author = {S.I. Kacman}, title = {Commutative semigroups with self-dual lattice of subsemigroups.}, journal = {Semigroup forum}, pages = {119--162}, publisher = {mathdoc}, volume = {18}, year = {1979}, zbl = {0419.20045}, url = {http://geodesic.mathdoc.fr/item/SF_1979__18_134348/} }
S.I. Kacman. Commutative semigroups with self-dual lattice of subsemigroups.. Semigroup forum, Tome 18 (1979), pp. 119-162. http://geodesic.mathdoc.fr/item/SF_1979__18_134348/