@article{MET_1995__42_3-4_176619,
     author = {Adalbert Wilhelm},
     title = {Subdifferentiability and {Lipschitz} {Continuity} in   {Experimental}   {Design}   {Problems.}},
     journal = {Metrika},
     pages = {365--378},
     publisher = {mathdoc},
     volume = {42},
     number = {3-4},
     year = {1995},
     zbl = {0847.62067},
     url = {http://geodesic.mathdoc.fr/item/MET_1995__42_3-4_176619/}
}