References
Clark, D. M. andFleischer, I.,A×A congruence coherent implies A congruence permutable. Algebra Univ.24 (1987), 192.
Geigher, D.,Congruence coherent algebras, 1974 Preprint; also see AMS Notices,21 (1974) A436.
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Duda, J. A×A congruence coherent impliesA congruence regular. Algebra Universalis 28, 301–302 (1991). https://doi.org/10.1007/BF01190858
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DOI: https://doi.org/10.1007/BF01190858