@article{PORMA_2006__63_4_53795,
     author = {Ricceri, Biagio},
     title = {Uniqueness properties of functionals with {Lipschitzian} derivative.},
     journal = {Portugaliae mathematica},
     pages = {393--400},
     publisher = {mathdoc},
     volume = {63},
     number = {4},
     year = {2006},
     zbl = {1131.49005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_2006__63_4_53795/}
}