Marek Salamak. "PROTECTIONS AND MONITORING OF EUROPEAN TRANSPORTATION ROUTES IN POLISH UPPER SILESIA MINING AREA." 14th International Multidisciplinary Scientific GeoConference SGEM 2014, Geoinformatics, Remote Sensing, and Artificial Intelligence, Vol. 14, Book 2, Volume 2, 2014. https://doi.org/10.5593/sgem2014/b22/s9.051