@article{MASLO_1987__37_2_a1,
     author = {\v{S}ulka, Robert},
     title = {Nilpotency in semigroups and sublattices of their {Booleans}},
     journal = {Mathematica slovaca},
     pages = {147--158},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {1987},
     mrnumber = {899430},
     zbl = {0616.20033},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a1/}
}