Every at most four element algebra has a Mal'cev theory for permutability
Mathematica slovaca, Tome 41 (1991) no. 1, pp. 35-39
@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},
year = {1991},
volume = {41},
number = {1},
mrnumber = {1094982},
zbl = {0779.08001},
language = {en},
url = {http://geodesic.mathdoc.fr/item/MASLO_1991_41_1_a5/}
}
Chajda, Ivan. Every at most four element algebra has a Mal'cev theory for permutability. Mathematica slovaca, Tome 41 (1991) no. 1, pp. 35-39. http://geodesic.mathdoc.fr/item/MASLO_1991_41_1_a5/
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