A Weaker Version of Congruence-Permutability for Semigroup Varieties
B. M. Vernikov

This publication is cited in the following articles:

1. Gusev S.V. Vernikov B.M., “Two Weaker Variants of Congruence Permutability For Monoid Varieties”, Semigr. Forum, 103:1 (2021), 106–152        
2. B. M. Vernikov, V. Yu. Shaprynskii, “Tri oslablennykh varianta kongruents-perestanovochnosti dlya mnogoobrazii polugrupp”, Sib. elektron. matem. izv., 11 (2014), 567–604  
3. L. N. Shevrin, B. M. Vernikov, M. V. Volkov, “Lattices of semigroup varieties”, Russian Math. (Iz. VUZ), 53:3 (2009), 1–28          
4. Vernikov BM, “Semigroup varieties with 1.5-permutable fully invariant congruences on their free objects”, Acta Applicandae Mathematicae, 85:1–3 (2005), 313–318