@article{102413, author = {Ivan Chajda}, title = {On the existence of non-trivial tolerances in permutable algebras}, journal = {Czechoslovak Mathematical Journal}, volume = {40}, year = {1990}, pages = {598-600}, zbl = {0742.08002}, mrnumber = {1084895}, language = {en}, url = {http://dml.mathdoc.fr/item/102413} }
Chajda, Ivan. On the existence of non-trivial tolerances in permutable algebras. Czechoslovak Mathematical Journal, Tome 40 (1990) pp. 598-600. http://gdmltest.u-ga.fr/item/102413/
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