Vitali Shekov. BSUIN - A UNIQUE INNOVATION PROGRAMME FOR UNDERGROUND SPACE DEVELOPMENT TO BE TESTED IN THE RUSKEALA MARBLE QUARRY AND SORTAVALA GEOPARK, KARELIA, RUSSIA. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining, 2018, pp. 143-150. https://doi.org/10.5593/sgem2018/1.3/s03.019