A KPI-enabled NFV MANO architecture for network slicing with QoS - Pol Alemany; Román, Anton; Ricard Vilalta; Ana Pol; José Bonnet; Evgenia Kapassa; Marios Touloupou; Kyriazis, Dimosthenis; Panagiotis Karkazis; Trakadas, Panagiotis; others (IEEE Communications Magazine, 2021)