@inproceedings{sgem2017s03080,
  title = {OPTIMIZING RELATIONSHIPS BETWEEN COSTS AND REVENUES ON QUARRIES IN THE CZECH REPUBLIC},
  author = {Hummel Martin and Mgr. Hummelova Ilona and Repka Vlastimil and Gibesova Beata},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining},
  year = {2017},
  pages = {629-636},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/13/s03.080}
}