Key technologies to accelerate the ICT Green evolution - An operator's point of view. - Azeddine Gati; Fatma Ezzahra Salem; Ana Maria Galindo Serrano; Didier Marquet; Stéphane Le Masson; Thomas Rivera; Dinh Thuy Phan Huy; Zwi Altman; Jean-Baptiste Landre; Olivier Simon; Esther Le Rouzic; Fabrice Bourgart; et al. (CoRR, 2019)