@article{RSMUP_1992__88__83_0,
     author = {Citti, Giovanna},
     title = {On the exterior {Dirichlet} problem for $\Delta u - u + f( x, u) = 0$},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {83--110},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {88},
     year = {1992},
     zbl = {0803.35050},
     mrnumber = {1209117},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1992__88__83_0/}
}