@article{ASNSP_2005_5_4_3_511_0,
     author = {Clarke, Francis},
     title = {Continuity of solutions to a basic problem in the calculus of variations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {511--530},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 4},
     number = {3},
     year = {2005},
     mrnumber = {2185867},
     zbl = {1127.49001},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_2005_5_4_3_511_0/}
}