Relation products of congruences and factor congruences
Relational characterizations of permutable and -permutable varieties
Relational classes and their characterizations
Relational structures and dependence spaces
Relations and topologies
Relations, coverings, hypergraphs and matroids
Relations on the lattice of congruences of a regular semigroup.
Relations With I-structure in Categories With Pullbacks
Relative Complements in the Weak Congruence Lattice
Remark on partially ordered sets, universal algebras and semigroups
Remarks on algebras having two bases of different cardinalities
Remarks on C-independence in Cartesian products of abstract algebras
Remarks on compactifying semigroups.
Remarks on heterogeneous algebras
Remarks on lattices of congruence relations of quasi-algebras
Remarks on -independence of Stone algebras
Remarks on subdirect representations in categories
Remarks on tolerance algebras
Representable epimorphisms of monoids
Représentation des algèbres universelles par des faisceaux