@article{MASLO_1991__41_1_a5,
     author = {Chajda, Ivan},
     title = {Every at most four element algebra has a {Mal'cev} theory for permutability},
     journal = {Mathematica slovaca},
     pages = {35--39},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1991},
     mrnumber = {1094982},
     zbl = {0779.08001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1991__41_1_a5/}
}