A scalable middleware-based infrastructure for energy management and visualization in city districts. - Francesco Gavino Brundu; Edoardo Patti; Matteo Del Giudice; Anna Osello; Michela Ramassotto; Fabrizio Massara; Francesca Marchi; Alberto Musetti; Enrico Macii; Andrea Acquaviva (EAI Endorsed Trans. Cloud Syst., 2017)