Energy performance of renovation alternatives of traditional rural houses in EstoniaAlev, Üllar; Arumägi, Endrik; Kalamees, TargoProceedings of CLIMA 2013 : 11th REHVA World Congress and the 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, Prague 16th-19th June, 20132013 / [9] p. : ill