Lyapin, E. S. The possibility of a semigroup continuation of a partial groupoid. (English. Russian original) Zbl 0711.20033 Sov. Math. 33, No. 12, 82-85 (1989); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 1989, No. 12(331), 68-70 (1989). MSC: 20M10 20M20 20N02 PDF BibTeX XML Cite \textit{E. S. Lyapin}, Sov. Math. 33, No. 12, 82--85 (1989; Zbl 0711.20033); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 1989, No. 12(331), 68--70 (1989)
Lyapin, E. S. On the possibility of semigroup extension of a partial groupoid. (Russian) Zbl 0702.20047 Izv. Vyssh. Uchebn. Zaved., Mat. 1989, No. 12(331), 68-70 (1989). Reviewer: Ja.Henno MSC: 20M10 20M20 20N02 PDF BibTeX XML Cite \textit{E. S. Lyapin}, Izv. Vyssh. Uchebn. Zaved., Mat. 1989, No. 12(331), 68--70 (1989; Zbl 0702.20047)