Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{GFA_1995__5_4_58197, author = {G. Perelman}, title = {Widths of {Nonnegatively} {Curved} {Spaces.}}, journal = {Geometric and functional analysis}, pages = {445--463}, publisher = {mathdoc}, volume = {5}, number = {4}, year = {1995}, zbl = {0845.53031}, url = {http://geodesic.mathdoc.fr/item/GFA_1995__5_4_58197/} }
G. Perelman. Widths of Nonnegatively Curved Spaces.. Geometric and functional analysis, Tome 5 (1995) no. 4, pp. 445-463. http://geodesic.mathdoc.fr/item/GFA_1995__5_4_58197/