@article{SF_1977__14_186371,
     author = {A. Alexander Selden},
     title = {The kernel of the determining endomorphism of a bisimple ...-semigroup.},
     journal = {Semigroup forum},
     pages = {265--272},
     publisher = {mathdoc},
     volume = {14},
     year = {1977},
     zbl = {0365.22004},
     url = {http://geodesic.mathdoc.fr/item/SF_1977__14_186371/}
}