Shevrin, L. N. On subsemigroups of free semigroups. (English. Russian original) Zbl 0100.02401 Sov. Math., Dokl. 1, 892-894 (1960); translation from Dokl. Akad. Nauk SSSR 133, 537-539 (1960). Reviewer: T. Tamura Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 6 Documents MSC: 20Mxx Semigroups Keywords:group theory PDF BibTeX XML Cite \textit{L. N. Shevrin}, Sov. Math., Dokl. 1, 892--894 (1960; Zbl 0100.02401); translation from Dokl. Akad. Nauk SSSR 133, 537--539 (1960) OpenURL