no. 2
On the density of the range for some nonlinear operators
Annales de l'I.H.P. Analyse non linéaire, Tome 6 (1989) no. 2, pp. 139-151. 
@article{AIHPC_1989__6_2_139_0,
     author = {Long, Yiming},
     title = {On the density of the range for some nonlinear operators},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {139--151},
     publisher = {Gauthier-Villars},
     volume = {6},
     number = {2},
     year = {1989},
     zbl = {0757.34034},
     mrnumber = {991875},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1989__6_2_139_0/}
}
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Long, Yiming. On the density of the range for some nonlinear operators. Annales de l'I.H.P. Analyse non linéaire, Tome 6 (1989) no. 2, pp. 139-151. http://www.numdam.org/item/AIHPC_1989__6_2_139_0/

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