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@article{MS2_1977__41_166553, author = {Ulrich Koschorke and Brian Sanderson}, title = {Geometric interpretations of the generalized {Hopf} invariant.}, journal = {Mathematica Scandinavica}, pages = {199--217}, publisher = {mathdoc}, volume = {41}, year = {1977}, zbl = {0385.55006}, url = {http://geodesic.mathdoc.fr/item/MS2_1977__41_166553/} }
Ulrich Koschorke; Brian Sanderson. Geometric interpretations of the generalized Hopf invariant.. Mathematica Scandinavica, Tome 41 (1977), pp. 199-217. http://geodesic.mathdoc.fr/item/MS2_1977__41_166553/