@article{GDZPPN001260480, title = {Cancellation in semigroups in which x2 = x3.}, journal = {Semigroup forum}, volume = {40}, year = {1990}, pages = {49-54}, url = {http://dml.mathdoc.fr/item/GDZPPN001260480} }
Brown, T.C. Cancellation in semigroups in which x2 = x3.. Semigroup forum, Tome 40 (1990) pp. 49-54. http://gdmltest.u-ga.fr/item/GDZPPN001260480/