Canvas model of the mining regions’ industrial ecosystem based on a circular economyOleksandr Amosha, Danylo Cherevatskyi, Oleksandr Lyakh, Myroslava Soldak and Yuliya ZaloznovaE3S Web Conf., 255 (2021) 01001DOI: https://doi.org/10.1051/e3sconf/202125501001