Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1971__46_139467, author = {Ernst A. Ruh}, title = {Curvature and {Differentiable} {Structure} on {Spheres}}, journal = {Commentarii mathematici Helvetici}, pages = {127--136}, publisher = {mathdoc}, volume = {46}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/CMH_1971__46_139467/} }
Ernst A. Ruh. Curvature and Differentiable Structure on Spheres. Commentarii mathematici Helvetici, Tome 46 (1971), pp. 127-136. http://geodesic.mathdoc.fr/item/CMH_1971__46_139467/