@article{10_21136_CMJ_1991_102482,
     author = {Zaj{\'\i}\v{c}ek, Lud\v{e}k},
     title = {Fr\'echet differentiability, strict differentiability and subdifferentiability},
     journal = {Czechoslovak Mathematical Journal},
     pages = {471--489},
     publisher = {mathdoc},
     volume = {41},
     number = {3},
     year = {1991},
     doi = {10.21136/CMJ.1991.102482},
     mrnumber = {1117801},
     zbl = {0760.46038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102482/}
}