@article{SF_1974__6_133986,
     author = {M.S. Putcha and J. Weissglass},
     title = {Application of semigroup algebras to ideal extensions of semigroups.},
     journal = {Semigroup forum},
     pages = {283--294},
     publisher = {mathdoc},
     volume = {6},
     year = {1974},
     zbl = {0267.20049},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133986/}
}