@article{GDZPPN001254677, title = {Certain Rees matrix semigroups with universal properties.}, journal = {Semigroup forum}, volume = {23}, year = {1981}, pages = {101-118}, zbl = {0479.20026}, url = {http://dml.mathdoc.fr/item/GDZPPN001254677} }
Petrich, M.; Reilly, N. Certain Rees matrix semigroups with universal properties.. Semigroup forum, Tome 23 (1981) pp. 101-118. http://gdmltest.u-ga.fr/item/GDZPPN001254677/