A review of non-residential building renovation and improvement of energy efficiency: office buildings in Finland, Sweden, Norway, Denmark, and GermanyKiviste, Mihkel; Musakka, Sami; Ruus, Aime; Vinha, JuhaEnergies2023 / art. 4220, 26 p https://doi.org/10.3390/en16104220 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS