@article{1195524893, author = {Kimura, Naoki}, title = {Note on idempotent semigroups, I}, journal = {Proc. Japan Acad.}, volume = {33}, number = {10}, year = {1957}, pages = { 642-645}, language = {en}, url = {http://dml.mathdoc.fr/item/1195524893} }
Kimura, Naoki. Note on idempotent semigroups, I. Proc. Japan Acad., Tome 33 (1957) no. 10, pp. 642-645. http://gdmltest.u-ga.fr/item/1195524893/