@article{10_1017_S0017089500000471,
     author = {Feller, E. H. and Gantos, R. L.},
     title = {Completely injective semigroups with central idempotents},
     journal = {Glasgow mathematical journal},
     pages = {16--20},
     year = {1969},
     volume = {10},
     number = {1},
     doi = {10.1017/S0017089500000471},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000471/}
}