Ficker, Tomas. "ROCK JOINT SURFACES AND THEIR CALIBRATION CURVES." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Science and Technologies in Geology, Exploration and Mining (2016): 245-252. https://doi.org/10.5593/sgem2016/b13/s02.031