@article{SF_1974__8_134033,
     author = {Angelika W\"orz-Busekros},
     title = {Ideals of {Schur-semigroups.}},
     journal = {Semigroup forum},
     pages = {140--155},
     year = {1974},
     volume = {8},
     zbl = {0282.20052},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__8_134033/}
}