Levy, Paul Étude d’une nouvelle classe de permutations. (French) Zbl 0033.34202 C. R. Acad. Sci., Paris 227, 578-579 (1948). PDFBibTeX XMLCite \textit{P. Levy}, C. R. Acad. Sci., Paris 227, 578--579 (1948; Zbl 0033.34202)
Levy, Paul Étude d’une classe de permutations. (French) Zbl 0033.34201 C. R. Acad. Sci., Paris 227, 422-423 (1948). PDFBibTeX XMLCite \textit{P. Levy}, C. R. Acad. Sci., Paris 227, 422--423 (1948; Zbl 0033.34201)