@article{MASLO_1988_38_2_a5,
     author = {Kme\v{t}, Franti\v{s}ek},
     title = {Radicals and their left ideal analogues in a semigroup},
     journal = {Mathematica slovaca},
     pages = {139--145},
     year = {1988},
     volume = {38},
     number = {2},
     mrnumber = {945367},
     zbl = {0643.20042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1988_38_2_a5/}
}