@Misc{ MarLea18, author = { Leandro Freitas Pessoa, and Mari, Luciano }, title = { Maximum principles at infinity and the Ahlfors-Khas'minskii duality: an overview }, journal = { }, year = { 2018 }, pages = { }, URL = { http://cvgmt.sns.it/paper/4889/ }, note = { cvgmt preprint} }