@article{CMUC_1968_9_3_a3,
     author = {Kolom\'y, Josef},
     title = {On the differentiability of operators and convex functionals},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {441--454},
     year = {1968},
     volume = {9},
     number = {3},
     mrnumber = {0238077},
     zbl = {0169.18504},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1968_9_3_a3/}
}