@article{GDZPPN002441470, title = {Abstract multiplication semigroups.}, journal = {Mathematische Zeitschrift}, volume = {212}, year = {1993}, pages = {1-16}, zbl = {0793.47046}, url = {http://dml.mathdoc.fr/item/GDZPPN002441470} }
Neerven, J.M.A.M. van. Abstract multiplication semigroups.. Mathematische Zeitschrift, Tome 212 (1993) pp. 1-16. http://gdmltest.u-ga.fr/item/GDZPPN002441470/