Lyapin, E. S. On representations of semigroups by partial transformations. (English. Russian original) Zbl 0128.02703 Transl., Ser. 2, Am. Math. Soc. 27, 289-296 (1963); translation from Mat. Sb., N. Ser. 52(94), 589-596 (1960). PDF BibTeX XML Cite \textit{E. S. Lyapin}, Transl., Ser. 2, Am. Math. Soc. 27, 289--296 (1963; Zbl 0128.02703); translation from Mat. Sb., N. Ser. 52(94), 589--596 (1960) Full Text: DOI
Lyapin, E. S. Über Darstellungen von Halbgruppen durch partielle Transformationen. (Russian) Zbl 0095.01603 Mat. Sb., N. Ser. 52(94), 589-596 (1960). PDF BibTeX XML Cite \textit{E. S. Lyapin}, Mat. Sb., Nov. Ser. 52(94), 589--596 (1960; Zbl 0095.01603)