@article{SF_1975__11_134146,
     author = {V.L. Mannepalli},
     title = {Multiplication  {SEMIGROUPS.}},
     journal = {Semigroup forum},
     pages = {310--327},
     publisher = {mathdoc},
     volume = {11},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__11_134146/}
}