Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1980__20_134418, author = {E. D. DeVun}, title = {Semigroups with [ x] [ y] = [y][x].}, journal = {Semigroup forum}, pages = {241--254}, publisher = {mathdoc}, volume = {20}, year = {1980}, zbl = {0442.22003}, url = {http://geodesic.mathdoc.fr/item/SF_1980__20_134418/} }
E. D. DeVun. Semigroups with [ x] [ y] = [y][x].. Semigroup forum, Tome 20 (1980), pp. 241-254. http://geodesic.mathdoc.fr/item/SF_1980__20_134418/