no. 4
Harnack inequalities for quasi-minima of variational integrals
Annales de l'I.H.P. Analyse non linéaire, Tome 1 (1984) no. 4, pp. 295-308. 
@article{AIHPC_1984__1_4_295_0,
     author = {Di Benedetto, E. and Trudinger, Neil S.},
     title = {Harnack inequalities for quasi-minima of variational integrals},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {295--308},
     publisher = {Gauthier-Villars},
     volume = {1},
     number = {4},
     year = {1984},
     zbl = {0565.35012},
     mrnumber = {778976},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1984__1_4_295_0/}
}
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Di Benedetto, E.; Trudinger, Neil S. Harnack inequalities for quasi-minima of variational integrals. Annales de l'I.H.P. Analyse non linéaire, Tome 1 (1984) no. 4, pp. 295-308. http://www.numdam.org/item/AIHPC_1984__1_4_295_0/

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