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@article{MZ_1980__173_172969, author = {David L. Ragozin}, title = {Curvatures and {Curves} in {Hilbert} {Space.}}, journal = {Mathematische Zeitschrift}, pages = {51--68}, publisher = {mathdoc}, volume = {173}, year = {1980}, zbl = {0417.53004}, url = {http://geodesic.mathdoc.fr/item/MZ_1980__173_172969/} }
David L. Ragozin. Curvatures and Curves in Hilbert Space.. Mathematische Zeitschrift, Tome 173 (1980), pp. 51-68. http://geodesic.mathdoc.fr/item/MZ_1980__173_172969/