On algebraic closure and amalgamation of semigroups.
On algebraically compact semigroup rings.
On anticommutative semirings.
On anti-inverse semigroups.
On bands in which every finitely generated subband is an endomorphic image.
On bases and maximal ideals in semigroups
On basis of identities of Brandt semigroups.
On Bruck-Reilly extensions.
On certain lattice-ordered semigroups.
On commutative semigroups which are unions of a finite number of principal ideals
On compact -semigroups
On compact regular semigroups of complex matrices.
On completely regular semigroups.
On compressed ideals in topological semigroups
On conditionally commutative semigroups.
On congruence lattices of regular semigroups with Q-inverse transversals.
On congruences on finite semigroups.
On dual semigroups
On Dual Semigroups
On Ek-semigroups.