Magnifying elements in semigroups.
Matrices of bisimple regular semigroups.
Matrix congruences on orthodox semigroups.
Maximal and minimal conditions in semigroups
Maximal ideal complements which are subsemigroups.
Maximal ideals in a semigroup of measures
Maximal inverse subsemigroups of S(Sn).
Maximal right congruences on semigroups.
Maximal submonoids of the semigroup of binary relations.
Maximizing a congruence with respect to its partition of idempotents.
Minimal conditions on Clifford semigroup congruences.
Minimal GROUP CONGRUENCES.
Modular posets and semigroups.
Modularity and distributivity of tolerance lattices of commutative inverse semigroups
Monoids characterized by their quasi-injective S-systems.
Monoids of Dedekind type.
More On Anti-Inverse Semigroups
Multiplication SEMIGROUPS.
Multiplication semigroups II.
Multiplication semigroups III.