@article{10_1017_S0017089508004333,
     author = {CANDITO, PASQUALE and LIVREA, ROBERTO and MOTREANU, DUMITRU},
     title = {2-SYMMETRIC {CRITICAL} {POINT} {THEOREMS} {FOR} {NON-DIFFERENTIABLE} {FUNCTIONS}},
     journal = {Glasgow mathematical journal},
     pages = {447--466},
     year = {2008},
     volume = {50},
     number = {3},
     doi = {10.1017/S0017089508004333},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004333/}
}