@article{1183494377,
author = {Graves, L. M.},
title = {Discontinuous solutions in the calculus
of variations},
journal = {Bull. Amer. Math. Soc.},
volume = {36},
number = {11},
year = {1930},
pages = { 831-846},
language = {en},
url = {http://dml.mathdoc.fr/item/1183494377}
}
Graves, L. M. Discontinuous solutions in the calculus of variations. Bull. Amer. Math. Soc., Tome 36 (1930) no. 11, pp. 831-846. http://gdmltest.u-ga.fr/item/1183494377/