SGEM SGEM 2016. 16th International Multidisciplinary Scientific GeoConference. Book 1. Science and Technologies in Geology, Exploration and Mining : conference proceedings. Albena, Bulgaria, 30 June - 6 July 2016 Volume III Hydrogeology, Engineering Geology & Geotechnics, Applied & Environmental Geophysics, Oil & Gas Exploration. -- 1. vyd. -- Sofia : STEF 92 Technology, 2016. -- 1034 s. -- ISBN : 978-619-7105-57-5. -- ISSN : 1314-2704.