@article{1183525275, author = {Tamura, Takayuki}, title = {Examples of direct products of semigroups or groupoids}, journal = {Bull. Amer. Math. Soc.}, volume = {69}, number = {4}, year = {1963}, pages = { 419-422}, language = {en}, url = {http://dml.mathdoc.fr/item/1183525275} }
Tamura, Takayuki. Examples of direct products of semigroups or groupoids. Bull. Amer. Math. Soc., Tome 69 (1963) no. 4, pp. 419-422. http://gdmltest.u-ga.fr/item/1183525275/