van Kampen, E. R. The topological transformations of a simple closed curve into itself. (English) Zbl 0011.03801 Am. J. Math. 57, 42-152 (1935). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 Documents Keywords:Topology PDF BibTeX XML Cite \textit{E. R. van Kampen}, Am. J. Math. 57, 42--152 (1935; Zbl 0011.03801) Full Text: DOI