Harnack Inequalities and Nonlinear Operators : Proceedings of the INdAM Conference to Celebrate the 70th Birthday of Emmanuele Dibenedetto - Vespri, Vincenzo; Andreucci, Daniele; Gianazza, Ugo; Monticelli, Dario Daniele; Punzo, Fabio (Springer International Publishing, 2021)