@article{CMH_1971__46_139467,
     author = {Ernst A. Ruh},
     title = {Curvature and {Differentiable} {Structure} on {Spheres}},
     journal = {Commentarii mathematici Helvetici},
     pages = {127},
     publisher = {mathdoc},
     volume = {46},
     year = {1971},
     language = {un},
     url = {https://geodesic-test.mathdoc.fr/item/CMH_1971__46_139467/}
}