Right Prime Ideals and Maximal Right Ideals in Semigroups Bedřich Pondělíček (1971) Matematický časopis
SAP compactifications of N-fold and infinite semidirect products. H.D. Junghenn (1995) Semigroup forum
Schützenberger Groups of ...-Classes Containing Odd Degree Polynomials. S. Subbiah, K.D. jr. MAG ILL (1975) Semigroup forum
Selfdistributive groupoids. Part D1: Left distributive semigroups Jaroslav Ježek, Tomáš Kepka (2006) Acta Universitatis Carolinae. Mathematica et Physica
Semi-Characters of the Multiplicative Semigroup of Integers Modulo m Bohumír Parízek, Štefan Schwarz (1961) Matematicko-fyzikálny časopis
Semigroup representations of commutative idempotent Abelian groupoids Jaroslav Ježek, Tomáš Kepka (1975) Commentationes Mathematicae Universitatis Carolinae
Semigroups and rings whose proper one-sided ideals are power joined Alessandra Cherubini, Ada Varisco (1984) Czechoslovak Mathematical Journal
Semigroups and the structure of categories Jerry R. Beehler, Arnold Johanson (1976) Mathematica Slovaca