@article{CMUC_1969_10_3_a9,
     author = {Nashed, Zuhair M.},
     title = {Higher order differentiability of nonlinear operators on normed spaces. {I}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {509--533},
     year = {1969},
     volume = {10},
     number = {3},
     mrnumber = {0261413},
     zbl = {0194.44802},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1969_10_3_a9/}
}