NIMARĂ, C., and Gr. BUIA. 2016. “COAL OF PETROŞANI BASIN, A DESIDERATUM BETWEEN SUSTAINABLE EXPLOITATION AND ENERGY SECURITY”. Studia Universitatis Babeș-Bolyai Geographia 61 (2):137-44. https://studia.reviste.ubbcluj.ro/index.php/subbgeographia/article/view/5655.