A new proof of the existence of the minimum for a classical integral
Compositio Mathematica, Tome 11 (1953), pp. 37-43. 
@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},
     pages = {37--43},
     publisher = {Kraus Reprint},
     volume = {11},
     year = {1953},
     mrnumber = {56207},
     zbl = {0050.32503},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1953__11__37_0/}
}
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VL  - 11
PB  - Kraus Reprint
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%0 Journal Article
%A Bertolini, Fernando
%T A new proof of the existence of the minimum for a classical integral
%J Compositio Mathematica
%D 1953
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%U http://archive.numdam.org/item/CM_1953__11__37_0/
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%F 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://archive.numdam.org/item/CM_1953__11__37_0/