Relatively congruence distributive subquasivarieties of a congruence modular variety
Keith A. Kearnes · Bulletin of the Australian Mathematical Society · 1990
We characterise the relatively congruence distributive subquasivarieties of a modular variety using the modular commutator. Our characterisation allows us to extend the results of Dziobiak concerning relatively congruence distributive quasivarieties of nonassociative R-algebras.