@article{AUCMP_1984_25_1_a2,
     author = {Kepka, T.},
     title = {Varieties of left distributive semigroups},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {3--18},
     year = {1984},
     volume = {25},
     number = {1},
     mrnumber = {0778070},
     zbl = {0589.20037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1984_25_1_a2/}
}