Refurbishment of Estonian detached houses in light of a survey of a hundred housing objectsLaur, Toomas; Sasi, Lennart; Osara, Leo; Pärlin, Veiko; Kauppinen, Timo; Saari, Arto; Kiiras, Juhani; Ilkka, Nina1998 https://www.ester.ee/record=b1271314*est