\Bibitem{Ada63} \by D.~F.~Adams \paper Vector fields on spheres \jour Matematika \yr 1963 \vol 7 \issue 6 \pages 49--80 \mathnet{http://mi.mathnet.ru/mat286} \mathscinet{https://mathscinet.ams.org/mathscinet-getitem?mr=0139178} \zmath{https://zbmath.org/?q=an:0112.38102} \transl \jour Ann. of Math. \yr 1962 \vol 75 \issue 3 \pages 603--632