@article{GDZPPN002061163, title = {Some Non-Linear Equivariant Sphere Bundles}, journal = {Commentarii mathematici Helvetici}, volume = {48}, year = {1973}, pages = {498-510}, zbl = {0267.55019}, url = {http://dml.mathdoc.fr/item/GDZPPN002061163} }
Erle, Dieter. Some Non-Linear Equivariant Sphere Bundles. Commentarii mathematici Helvetici, Tome 48 (1973) pp. 498-510. http://gdmltest.u-ga.fr/item/GDZPPN002061163/