Naser Peci (2013). GEOSTATISTICAL ANALYSIS OF THE DRENICA COAL BASIN   FIELD SKENDERAJ, KOSOVO. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING. https://doi.org/10.5593/sgem2013/ba1.v1/s01.011