@article{CM_1953__11__37_0, author = {Bertolini, Fernando}, title = {A new proof of the existence of the minimum for a classical integral}, journal = {Compositio Mathematica}, volume = {11}, year = {1953}, pages = {37-43}, mrnumber = {56207}, zbl = {0050.32503}, language = {en}, url = {http://dml.mathdoc.fr/item/CM_1953__11__37_0} }
Bertolini, Fernando. A new proof of the existence of the minimum for a classical integral. Compositio Mathematica, Tome 11 (1953) pp. 37-43. http://gdmltest.u-ga.fr/item/CM_1953__11__37_0/