Zeeman, E. C. Unknotting 3-spheres in six dimensions. (English) Zbl 0116.14902 Proc. Am. Math. Soc. 13, 753-757 (1962). PDFBibTeX XMLCite \textit{E. C. Zeeman}, Proc. Am. Math. Soc. 13, 753--757 (1962; Zbl 0116.14902) Full Text: DOI
Curtis, M. L.; Zeeman, E. C. On the polyhedral Schoenflies theorem. (English) Zbl 0096.37903 Proc. Am. Math. Soc. 11, 888-889 (1961). PDFBibTeX XMLCite \textit{M. L. Curtis} and \textit{E. C. Zeeman}, Proc. Am. Math. Soc. 11, 888--889 (1961; Zbl 0096.37903) Full Text: DOI