@article{GDZPPN001253301, title = {The factorizable transformation semigroups.}, journal = {Semigroup forum}, volume = {18}, year = {1979}, pages = {15-20}, zbl = {0416.20054}, url = {http://dml.mathdoc.fr/item/GDZPPN001253301} }
Tirasupa, Y. The factorizable transformation semigroups.. Semigroup forum, Tome 18 (1979) pp. 15-20. http://gdmltest.u-ga.fr/item/GDZPPN001253301/