SGEM SGEM 2023. 23rd International Multidisciplinary Scientific GeoConference : conference proceedings. 03 - 09 July 2023, Albena, Bulgaria Issue 1.1 Hydrogeology, Engineering Geology and Geotechnics. -- 1. vyd. -- Sofia : STEF 92 Technology, 2023. -- ISBN : 978-619-7603-56-9. -- ISSN : 1314-2704. -- 10.5593/sgem2023/1.1.