On a Generalization of Permutable Equivalence Relations
On a mechanism of defining morphisms in concrete categories
On a power of relational structures
On a Question of J. Hashimoto
On a representation of semigroups by products of algebras and relations
On a simple one-element extension of left zero semigroups
On algebraic operations of a lattice-ordered group
On algebra-lattices
On another two cryptographic identities in universal Osborn loops.
On automorphisms of algebras with a single unary operation
On Cartesian products
On certain congruence lattices of finite unary algebras
On countably universal Boolean algebras compact classes of models
On embedding of lattices in simple lattices
On equationally compact semigroups.
On existence conditions for compatible tolerances
On groups in which idempotent reducts form a chain
On Interassociativity and Related Questions
On middle universal weak and cross inverse property loops with equal length of inverse cycles.
On products of binary relational structures