@article{105998, author = {Sin Min Lee}, title = {On a simple one-element extension of left zero semigroups}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {021}, year = {1980}, pages = {313-318}, zbl = {0437.08005}, mrnumber = {580686}, language = {en}, url = {http://dml.mathdoc.fr/item/105998} }
Lee, Sin Min. On a simple one-element extension of left zero semigroups. Commentationes Mathematicae Universitatis Carolinae, Tome 021 (1980) pp. 313-318. http://gdmltest.u-ga.fr/item/105998/
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