@article{RSMUP_1995__94__137_0,
     author = {Birindelli, Isabeau and Cutr{\`\i}, Alessandra},
     title = {A semi-linear problem for the {Heisenberg} laplacian},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {137--153},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {94},
     year = {1995},
     mrnumber = {1370909},
     zbl = {0858.35040},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1995__94__137_0/}
}