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Partially supported by NSF Grant MCS 76-07158
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Madsen, I., Taylor, L.R. & Williams, B. Tangential homotopy equivalences. Commentarii Mathematici Helvetici 55, 445–484 (1980). https://doi.org/10.1007/BF02566699
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DOI: https://doi.org/10.1007/BF02566699