@article{10_4064_am_24_4_465_474,
     author = {Vladimir Demyanov and Diethard Pallaschke},
     title = {Point derivations for {Lipschitz} functions {andClarke's} generalized derivative},
     journal = {Applicationes Mathematicae},
     pages = {465--474},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1997},
     doi = {10.4064/am-24-4-465-474},
     zbl = {0916.49013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-24-4-465-474/}
}