@article{PDML_1967__4_3_69_0,
     author = {Petolla, G.},
     title = {Approximation d'un probl\`eme variationnel non lin\'eaire},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {69--90},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {4},
     number = {3},
     year = {1967},
     mrnumber = {236728},
     zbl = {0182.19102},
     language = {fr},
     url = {http://www.numdam.org/item/PDML_1967__4_3_69_0/}
}