@article{AIHPC_2003__20_6_911_0,
     author = {Cellina, A. and Ferriero, A.},
     title = {Existence of lipschitzian solutions to the classical problem of the calculus of variations in the autonomous case},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {911--919},
     publisher = {Elsevier},
     volume = {20},
     number = {6},
     year = {2003},
     doi = {10.1016/S0294-1449(03)00010-6},
     mrnumber = {2008683},
     zbl = {1030.49039},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/S0294-1449(03)00010-6/}
}