@article{GDZPPN002354640,
title = {Geometric interpretations of the generalized Hopf invariant.},
journal = {Mathematica Scandinavica},
volume = {40},
year = {1977},
pages = {199-217},
zbl = {0385.55006},
url = {http://dml.mathdoc.fr/item/GDZPPN002354640}
}
Koschorke, Ulrich; Sanderson, Brian. Geometric interpretations of the generalized Hopf invariant.. Mathematica Scandinavica, Tome 40 (1977) pp. 199-217. http://gdmltest.u-ga.fr/item/GDZPPN002354640/