@article{SF_1982__24_134537,
     author = {T. Tamura},
     title = {Semilattice {Indecomposable} semigroups with a unique {Idempotent.}},
     journal = {Semigroup forum},
     pages = {77--82},
     publisher = {mathdoc},
     volume = {24},
     year = {1982},
     zbl = {0505.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1982__24_134537/}
}