Embedding semigroups in groups. A geometrical approach. Krstić, Sava (1985) Publications de l'Institut Mathématique. Nouvelle Série
Embedding semigroups in nilpotent-generated semigroups John Mackintosh Howie (1989) Mathematica Slovaca
Embedding semigroups into semigroups with countability index two. K.D. jr. Magill (1989) Semigroup forum
Embedding topological semigroups into the hyperspaces over topological groups Taras O. Banakh, Olena Hryniv (2007) Acta Universitatis Carolinae. Mathematica et Physica
Embeddings in iteration groups and semigroups with nontrivial units. Jürgen Weitkämper (1983) Stochastica
Endomorphism monoids of free acts and 0-wreath products of monoids III. U. Knauer, A. Mikhalev (1980) Semigroup forum
Endomorphism monoids of free acts and 0-wreath products of monoids, I. Annihilator properties. U. Knauer, A. Mikhalev (1980) Semigroup forum
Endomorphism monoids of free acts and 0-wreath products of monoids, II. Regularity. U. Knauer, A. Mikhalev (1980) Semigroup forum
Epimorphisms of inverse semigroups of homeomorphisms between closed subsets. B. Baird (1977) Semigroup forum