@article{SF_1993__47_2_135283,
     author = {A. El-Qallali},
     title = {Abundant semigroups with a multiplicative type {A} transversal.},
     journal = {Semigroup forum},
     pages = {327--340},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1993},
     zbl = {0790.20078},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__47_2_135283/}
}