Whitehead, George W. A generalization of the Hopf invariant. (English) Zbl 0041.51903 Ann. Math. (2) 51, 192-237 (1950). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 7 Documents Keywords:Topology PDF BibTeX XML Cite \textit{G. W. Whitehead}, Ann. Math. (2) 51, 192--237 (1950; Zbl 0041.51903) Full Text: DOI