Spisak, Jan, Olijar, Andrej, Zelko, Miroslav. CALORIFIC VALUE SENSOR. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING, 2015, pp. 129-134. https://doi.org/10.5593/sgem2015/b13/s3.017