@article{CMUC_1976_17_1_a10,
     author = {John, Kamil and Zizler, V\'aclav E.},
     title = {A note on strong differentiability spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {127--134},
     year = {1976},
     volume = {17},
     number = {1},
     mrnumber = {0402469},
     zbl = {0346.46008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976_17_1_a10/}
}