Heat pump use in rural district heating networks in EstoniaLepiksaar, Kertu; Kalme, Kiur; Siirde, Andres; Volkova, AnnaEnvironmental and climate technologies2021 / p. 786–802 https://doi.org/10.2478/rtuect-2021-0059 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS