@article{10_1017_S0017089500005577,
     author = {Houghton, C. H. and Sullivan, R. P.},
     title = {Completely zero-simple semigroups generated by nilpotent elements},
     journal = {Glasgow mathematical journal},
     pages = {163--165},
     year = {1984},
     volume = {25},
     number = {2},
     doi = {10.1017/S0017089500005577},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500005577/}
}