@article{MAN_1967__170_161545,
     author = {G. GR\"ATZER},
     title = {On the {Endomorphism} {Semigroup} of {Simple} {Algebras.}},
     journal = {Mathematische Annalen},
     pages = {334--338},
     publisher = {mathdoc},
     volume = {170},
     year = {1967},
     zbl = {0146.02105},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__170_161545/}
}