1. Aguzzoli, S., Bova, S., Gerla, B.: Free algebras and functional representation for fuzzy logics. In: Cintula, P., Hájek, P., Noguera, C. (eds.) Handbook of Mathematical Fuzzy Logic. Volume 2, volume 38 of Studies in Logic. Mathematical Logic and Foundation, pp. 713–791. College Publications (2011)
2. Aguzzoli, S., Busaniche, M., Marra, V.: Spectral duality for finitely generated nilpotent minimum algebras, with applications. J. Logic Comput. 17(4), 749–765 (2007)
3. Balbes, R.: A representation theorem for distributive quasilattices. Fundamenta Mathematicae 68, 207–214 (1970)
4. Bergman, C., Failing, D.: Commutative idempotent groupoids and the constraint satisfaction problem. Algebra Universalis 73(3), 391–417 (2015)
5. Bochvar, D.: On a three-valued calculus and its application in the analysis of the paradoxes of the extended functional calculus. Mathematicheskii Sbornik 4, 287–308 (1938)