Metaxas Α., Georgakopoulos Α., Karageorgiou, D., Papanikolaou, G. and Karageorgiou, E. 2010. CO2 CONTENT OF GREEK LIGNITE: THE CASE OF PROASTIO LIGNITE DEPOSIT IN PTOLEMAIS BASIN, NORTHERN GREECE. Bulletin of the Geological Society of Greece. 43, 5 (Jan. 2010), 2274–2283. DOI:https://doi.org/10.12681/bgsg.11427.