Thomas, Emery A generalization of the Pontrjagin square cohomology operation. (English) Zbl 0071.16302 Proc. Natl. Acad. Sci. USA 42, 266-269 (1956). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 Documents Keywords:topology PDFBibTeX XMLCite \textit{E. Thomas}, Proc. Natl. Acad. Sci. USA 42, 266--269 (1956; Zbl 0071.16302) Full Text: DOI