@article{102410, author = {Josef Niederle}, title = {Transitivity of principal tolerances is not a Mal'cev property}, journal = {Czechoslovak Mathematical Journal}, volume = {40}, year = {1990}, pages = {563-565}, zbl = {0739.08004}, mrnumber = {1084892}, language = {en}, url = {http://dml.mathdoc.fr/item/102410} }
Niederle, Josef. Transitivity of principal tolerances is not a Mal'cev property. Czechoslovak Mathematical Journal, Tome 40 (1990) pp. 563-565. http://gdmltest.u-ga.fr/item/102410/
Relatives of 3-permutability and principal tolerance trivial varieties, Anmales Univ. Sci. Budapest. Sectio Math. 28 (1985), 37-47. (1985) | MR 0856974
Minimal compatible tolerances on lattices, Czechoslovak Math. J. 27 (1977), 452-459. (1977) | MR 0457300
Condition for trivial principal tolerances, Arch. Math. Brno 19 (1983), 145-152. (1983) | MR 0725197
Conditions for transitive principal tolerances, Czechoslovak Math. J. 39 (1989), 380-381. (1989) | MR 0992141 | Zbl 0686.08003