Energy efficiency and indoor climate of apartment and educational buildings in EstoniaKõiv, Teet-Andrus; Maivel, Mikk; Mikola, Alo; Kuusk, KalleRecent Researches in Energy, Environment, Devices, Systems, Communications and Computers : International Conference on Energy, Environment, Devices, Systems, Communications, Computers (EEDSCC'11) : Venice, Italy, March 8-10, 20112011 / p. 191-196 : ill Hydropower or non-market values of nature : a contingent valuation study of Jägala Waterfalls, EstoniaEhrlich, Üllas; Reimann, MartRecent Researches in Energy, Environment, Devices, Systems, Communications and Computers : International Conference on Energy, Environment, Devices, Systems, Communications, Computers (EEDSCC'11) : Venice, Italy, March 8-10, 20112011 / p. 232-237 : ill