Demeter, Timea, and Gabriel Brătucu. “Modern Heating Systems - Population’s View and Perspectives”. International Journal of Economic Practices and Theories 4, no. 2 (February 1, 2014): 230-238. Accessed September 19, 2024. http://ijept.eu/index.php/ijept/article/view/222-229%20Modern_Heating_Systems_Population_View_and_Perspective.