@article{SF_1977__15_134233,
     author = {F. Pastijn},
     title = {Idempotent-generated completely 0-simple semigroups.},
     journal = {Semigroup forum},
     pages = {41--50},
     year = {1977},
     volume = {15},
     zbl = {0372.20051},
     url = {http://geodesic.mathdoc.fr/item/SF_1977__15_134233/}
}