@article{10_21136_CMJ_1965_100671,
     author = {Hofmann, Karl Heinrich and Mostert, Paul S.},
     title = {Connected extensions of simple semigroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {295--298},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1965},
     doi = {10.21136/CMJ.1965.100671},
     mrnumber = {0175100},
     zbl = {0135.06601},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1965.100671/}
}