Bonfiglioli, A. and Lanconelli, E. 2009. Dirichlet problem with L^p-boundary data in contractible domains of Carnot groups. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE. 5, 4 (Dec. 2009), 579-610. DOI:https://doi.org/10.2422/2036-2145.2006.4.06.