Pellegrini, Marco, Augusto Bianchini, Alessandro Guzzini, and Cesare Saccani. 2019. “Classification through Analytic Hierarchy Process of the Barriers in the Revamping of Traditional District Heating Networks into Low Temperature District Heating: An Italian Case Study”. International Journal of Sustainable Energy Planning and Management 20 (February). Aalborg, Denmark. https://doi.org/10.5278/ijsepm.2019.20.5.