Optimizing solar energy integration in Tallinn's district heating and cooling systemsLepiksaar, Kertu; Kajandi, G-M.; Sukumaran, Sreenath; Krupenski, Igor; Kirs, Tanel; Volkova, AnnaSmart Energy2025 / art. 100166 https://doi.org/10.1016/j.segy.2024.100166