Primary energy factor for district heating networks in European Union member statesLatõšov, Eduard; Volkova, Anna; Siirde, Andres; Kurnitski, Jarek; Thalfeldt, MartinEnergy procedia2017 / p. 69-77 : ill https://doi.org/10.1016/j.egypro.2017.05.056 Conference proceedings at Scopus Article at Scopus Article at WOS