Mapping of regional policies and actions for industrial symbiosis – activities of the SUN working group n° 2, Fantin, V., Mencherini Ugo, Boncio Elisabetta, Paoni Susanna, Creanza Giuseppe, Cuna Francesca, Mansanta Chiara, Lancia Gerardo, Foschi Eleonora, and La Monica Marco , Symbiosis Users Network – SUN Proceedings of the third SUN Conference Rimini - November 7th 2019, 11/2019, p.13–17, (2020)