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May 1, 1947Proceedings of the National Academy of SciencesOpen Access

An Expression of Hopf's Invariant as an Integral

J. H. C. Whitehead

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Burhoe (published here- with) to avoid confusion with A, agouti, dominant allele of a.

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J. H. C. Whitehead (1947) studied this question.

synapsesocial.com/papers/6aa17347dc6fbdec443d4f5e https://doi.org/10.1073/pnas.33.5.117

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