Lazar, Maria, Faur, Assist.Dr.Eng. Florin (2012). CONSIDERATIONS ON THE INFLUENCE OF EXTRACTION TECHNOLOGY OF LIGNITE IN OPEN PITS OVER THE PRODUCTION QUALITY. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference, 503 - 510 pp. https://doi.org/10.5593/sgem2012/s03.v1013