Implementation experience in multi-domain SDN: Challenges, consolidation and future directions. - Kostas Katsalis; Bijan Rahimzadeh Rofoee; Giada Landi; Jordi Ferrer Riera; Kostas Kousias; Markos P. Anastasopoulos; L. Kiraly; Anna Tzanakaki; Thanasis Korakis (Comput. Networks, 2017)