@article{GAMA_1979_1979_1_a0,
     author = {Encel, Alejandro B.},
     title = {Estructura y clasificaci\'on de semigrupos {Tn,III:} {Semigrupos} {T4.}},
     journal = {Gaceta matem\'atica},
     pages = {3-6},
     publisher = {mathdoc},
     volume = {31},
     number = {1-2},
     year = {1979},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1979_1979_1_a0/}
}