@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/}
}