@article{1250131302, author = {Rothe, E.H.}, title = {Morse theory in Hilbert space}, journal = {Rocky Mountain J. Math.}, volume = {3}, number = {4}, year = {1973}, pages = { 251-274}, language = {en}, url = {http://dml.mathdoc.fr/item/1250131302} }
Rothe, E.H. Morse theory in Hilbert space. Rocky Mountain J. Math., Tome 3 (1973) no. 4, pp. 251-274. http://gdmltest.u-ga.fr/item/1250131302/