Factors affecting the improvement of district heating. Case studies of Estonia and SerbiaRušeljuk, Pavel; Volkova, Anna; Lukic, Nebojša; Lepiksaar, Kertu; Nikolic, Novak; Nešovic, Aleksandar; Siirde, AndresEnvironmental and Climate Technologies2021 / p. 521−533 https://doi.org/10.2478/rtuect-2020-0121 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Methodology for evaluating the transition process dynamics towards 4th generation district heating systemsVolkova, Anna; Mašatin, Vladislav; Siirde, AndresEnergy2018 / p. 253-261 : ill https://doi.org/10.1016/j.energy.2018.02.123 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS