SGEM 2018. 18th International Multidisciplinary Scientific GeoConference. Volume 18. Informatics, Geoinformatics and Remote Sensing : conference proceedings. Albena, Bulgaria, 2 July - 8 July 2018. Issue 2.2 Geodesy and Mine Surveying. 1. vyd. Sofia : STEF 92 Technology, 2018. 1130 s. ISBN 978-619-7408-40-9. ISSN 1314-2704.