@article{CMUC_1996_37_3_a5,
     author = {Giles, J. R. and Sciffer, Scott},
     title = {Fr\'echet directional differentiability and {Fr\'echet} differentiability},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {489--497},
     year = {1996},
     volume = {37},
     number = {3},
     mrnumber = {1426913},
     zbl = {0881.58011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1996_37_3_a5/}
}