Constructing ordered groupoids
Constructing the maximal monoids in the semigroups , and
Construction and representation of regular semigroups.
Construction de codes indécomposables
Construction of medial semigroups
Construction of set theoretic complete intersections via semigroup gluing.
Continuous monoids and yields of infinite trees
Contraction semigroups and representations.
Contractive representations: A family of inverse monoids and semigroups and finite R-classes.
Correction and supplement to "On a pull-back diagram for orthodox semigroups".
Correction to "A simple construction of semigroups all of whose subsemigroups are left ideals."
Correction to my paper: “Commutative semi-primary -semigroups”
Correction to my paper "On a type of matrix semigroup algebras" .
Correction to my paper on structure and ideal theory of commutative semigroups
Correction to the paper “On compressed ideals in topological semigroups”
Corrigenda to "New semigroups of binary relations" "by Karen Chase.
Corrigendum: On linear algebraic semigroups. III.
Corrigendum to "Infinite words and permutation properties".
Corrigendum to "Operators and products in the lattice of existence varieties of regular semigroups".
Corrigendum to "The join of the pseudovarieties of idempotent semigroups and locally trivial semigroups".