Tudor Goldan. "UP-TO-DATE METHODS AIMED AT OPTIMUM MINING TECHNOLOGY SELECTION IN LIGNITE OPEN-PITS FROM THE ROMANIAN OLTENIA BASIN." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference, 2011. https://doi.org/10.5593/sgem2011/s03.153