Boardman, J. Michael Some embeddings of 2-spheres in 4-manifolds. (English) Zbl 0127.39102 Proc. Camb. Philos. Soc. 60, 354-356 (1964). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 4 Documents Keywords:topology PDFBibTeX XMLCite \textit{J. M. Boardman}, Proc. Camb. Philos. Soc. 60, 354--356 (1964; Zbl 0127.39102)