@article{GDZPPN002423804, title = {Curvatures and Curves in Hilbert Space.}, journal = {Mathematische Zeitschrift}, volume = {174}, year = {1980}, pages = {51-68}, zbl = {0417.53004}, url = {http://dml.mathdoc.fr/item/GDZPPN002423804} }
Ragozin, David L. Curvatures and Curves in Hilbert Space.. Mathematische Zeitschrift, Tome 174 (1980) pp. 51-68. http://gdmltest.u-ga.fr/item/GDZPPN002423804/