@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/