@article{RLIN_2003_9_14_3_a5,
     author = {Lanconelli, Ermanno},
     title = {Nonlinear equations on {Carnot} groups and curvature problems for {CR} manifolds},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {227--238},
     publisher = {mathdoc},
     volume = {Ser. 9, 14},
     number = {3},
     year = {2003},
     zbl = {1225.35059},
     mrnumber = {1614571},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_2003_9_14_3_a5/}
}