Griffiths, L. W. On hypergroups, multigroups, and product systems. (English) Zbl 0018.39303 Am. J. Math. 60, 345-354 (1938). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents Keywords:Group theory PDF BibTeX XML Cite \textit{L. W. Griffiths}, Am. J. Math. 60, 345--354 (1938; Zbl 0018.39303) Full Text: DOI OpenURL