@article{COCV_2012__18_4_930_0,
     author = {Liang, Sihua and Zhang, Jihui},
     title = {Multiplicity of solutions for the noncooperative $p$-laplacian operator elliptic system with nonlinear boundary conditions},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {930--940},
     year = {2012},
     publisher = {EDP Sciences},
     volume = {18},
     number = {4},
     doi = {10.1051/cocv/2011189},
     zbl = {1276.35091},
     language = {en},
     url = {https://www.numdam.org/articles/10.1051/cocv/2011189/}
}