Emch, A. Some properties of closed convex curves in a plane. (English) JFM 44.0561.01 Amer. Journ. 35, 407-412 (1913). Cited in 1 ReviewCited in 20 Documents JFM Section:Achter Abschnitt. Reine, elementare und synthetische Geometrie. Kapitel 2. Kontinuitäsbetrachtungen (Analysis situs, Topologie). PDFBibTeX XMLCite \textit{A. Emch}, Am. J. Math. 35, 407--412 (1913; JFM 44.0561.01) Full Text: DOI