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@article{CMH_1972__47_139524, author = {Douglas C. Ravenel}, title = {A {Definition} of {Exotic} {Characteristic} {Classes} of {Spherical} {Fibrations}}, journal = {Commentarii mathematici Helvetici}, pages = {421--436}, publisher = {mathdoc}, volume = {47}, year = {1972}, zbl = {0258.55008}, url = {http://geodesic.mathdoc.fr/item/CMH_1972__47_139524/} }
Douglas C. Ravenel. A Definition of Exotic Characteristic Classes of Spherical Fibrations. Commentarii mathematici Helvetici, Tome 47 (1972), pp. 421-436. http://geodesic.mathdoc.fr/item/CMH_1972__47_139524/