Beata Gibesova, Vaclav Zubicek, Kamila Dobesova Doc. Dana Vrublova. "OPTIMIZING OF COSTS AND REVENUES ON STONE AND COAL QUARRIES." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining (2017): 621-628. https://doi.org/10.5593/sgem2017/13/s03.079