Lefebvre, Pierre Sur la plus fine équivalence simplifiable d’un demi-groupe. (French) Zbl 0104.01802 C. R. Acad. Sci., Paris 251, 1205-1207 (1960). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:group theory PDFBibTeX XMLCite \textit{P. Lefebvre}, C. R. Acad. Sci., Paris 251, 1205--1207 (1960; Zbl 0104.01802)