@Misc{ FerAnd14, author = { Ferrari, Fausto and Pinamonti, Andrea }, title = { Characterization by asymptotic mean formulas of q-harmonic functions in Carnot groups }, journal = { Potential Analysis }, year = { 2014 }, pages = { }, URL = { http://cvgmt.sns.it/paper/2467/ }, note = { cvgmt preprint} }