@article{2349, author = {Luh, Jiang}, title = {On the concepts of radical of semigroup having Kernel}, journal = {Portugaliae mathematica}, volume = {19}, year = {1960}, pages = {189-198}, zbl = {0095.01405}, mrnumber = {0131482}, language = {en}, url = {http://dml.mathdoc.fr/item/2349} }
Luh, Jiang. On the concepts of radical of semigroup having Kernel. Portugaliae mathematica, Tome 19 (1960) pp. 189-198. http://gdmltest.u-ga.fr/item/2349/