Quasi-minima
Annales de l'I.H.P. Analyse non linéaire, Volume 1 (1984) no. 2, p. 79-107 
@article{AIHPC_1984__1_2_79_0,
     author = {Giaquinta, Mariano and Giusti, Enrico},
     title = {Quasi-minima},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     publisher = {Gauthier-Villars},
     volume = {1},
     number = {2},
     year = {1984},
     pages = {79-107},
     zbl = {0541.49008},
     mrnumber = {778969},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1984__1_2_79_0}
}

Giaquinta, Mariano; Giusti, Enrico. Quasi-minima. Annales de l'I.H.P. Analyse non linéaire, Volume 1 (1984) no. 2, pp. 79-107. http://www.numdam.org/item/AIHPC_1984__1_2_79_0/

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