@article{CMJ_2008__58_4_a0,
     author = {Bashir, Robert El and Kepka, Tom\'a\v{s}},
     title = {Commutative zeropotent semigroups with few invariant congruences},
     journal = {Czechoslovak Mathematical Journal},
     pages = {865--885},
     publisher = {mathdoc},
     volume = {58},
     number = {4},
     year = {2008},
     mrnumber = {2471153},
     zbl = {1165.20322},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2008__58_4_a0/}
}