@Misc{ CaLiMoRo23, author = { Catino, Giovanni and Li, Yanyan and Monticelli, Dario D. and Roncoroni, Alberto }, title = { A Liouville theorem in the Heisenberg group }, journal = { J. Eur. Math. Soc. }, year = { 2024 }, pages = { }, URL = { http://cvgmt.sns.it/paper/6245/ }, note = { cvgmt preprint} }