@article{AUCMP_2005__46_1_a4,
     author = {Bashir, Robert El and Kepka, Tom\'a\v{s} and Kechlibar, Marian},
     title = {Commutative semigroups with few fully invariant congruences {I.}},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {49--64},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {2005},
     mrnumber = {2195569},
     zbl = {1103.20055},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_2005__46_1_a4/}
}