%0 Electronic Article %A Whitehead, George W. %I National Academy of Sciences of the United States of America %D 1946 %D 1946 %G English %@ 0027-8424 %~ Staatliche Kunstsammlungen Dresden, Kunstbibliothek %T A Generalization of the Hopf Invariant %V 32 %J Proceedings of the National Academy of Sciences of the United States of America %V 32 %N 6 %P 188-190 %U https://www.jstor.org/stable/87580 %Z https://katalog.skd.museum/Record/ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS84NzU4MA %U https://katalog.skd.museum/Record/ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS84NzU4MA