@article{MASLO_1990__40_2_a3,
     author = {Chajda, Ivan},
     title = {A principal congruence identity characterizing the variety of distributive lattices with zero},
     journal = {Mathematica slovaca},
     pages = {129--131},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1990},
     mrnumber = {1094768},
     zbl = {0742.06006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1990__40_2_a3/}
}