@article{SF_1972__5_133947,
     author = {T. Tamura},
     title = {Remark on the smallest semilattice congruence.},
     journal = {Semigroup forum},
     pages = {277--282},
     publisher = {mathdoc},
     volume = {5},
     year = {1972},
     zbl = {0262.20072},
     url = {http://geodesic.mathdoc.fr/item/SF_1972__5_133947/}
}