Chern, Shiing-shen; Spanier, Edwin H. A theorem on orientable surfaces in four-dimensional space. (English) Zbl 0043.38403 Comment. Math. Helv. 25, 205-209 (1951). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 23 Documents Keywords:Topology PDFBibTeX XMLCite \textit{S.-s. Chern} and \textit{E. H. Spanier}, Comment. Math. Helv. 25, 205--209 (1951; Zbl 0043.38403) Full Text: DOI EuDML