Rees, D. On semi-groups. (English) Zbl 0028.00401 Proc. Camb. Philos. Soc. 36, 387-400 (1940). PDFBibTeX XMLCite \textit{D. Rees}, Proc. Camb. Philos. Soc. 36, 387--400 (1940; Zbl 0028.00401)
Rees, D. On semi-groups. (English) JFM 66.1207.01 Proc. Cambridge philos. Soc. 36, 387-400 (1940). Reviewer: Lorenzen, P., Dr. (Bonn) PDFBibTeX XMLCite \textit{D. Rees}, Proc. Camb. Philos. Soc. 36, 387--400 (1940; JFM 66.1207.01) Full Text: DOI