@article{GDZPPN001254782, title = {Periodic properties of groupbound semigroups.}, journal = {Semigroup forum}, volume = {23}, year = {1981}, pages = {225-234}, zbl = {0462.20052}, url = {http://dml.mathdoc.fr/item/GDZPPN001254782} }
Madison, B.; Mukherjea, T.K.; Sen, M.K. Periodic properties of groupbound semigroups.. Semigroup forum, Tome 23 (1981) pp. 225-234. http://gdmltest.u-ga.fr/item/GDZPPN001254782/