Modelling framework for integration of large-scale heat pumps in district heating using low-temperature heat sources : A case study of Tallinn, EstoniaPieper, Henrik; Mašatin, Vladislav; Volkova, Anna; Ommen, Torben; Elmegaard, Brian; Markussen, Wiebke BrixInternational journal of sustainable energy planning and management2019 / p. 67–86 : ill https://doi.org/10.5278/ijsepm.2019.20.6 Journal metrics at Scopus Article at Scopus