TY - CPAPER AU - Nikolay Hristov AU - Efrosima Zaneva-Dobranova TI - DEVELOPMENT AND MODERNIZATION OF NATURAL GAS STORAGE IN BULGARIA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Science and Technologies in Geology, Exploration And Mining PY - 2021 SP - 609 EP - 616 DO - 10.5593/sgem2021/1.1/s06.110 PB - STEF92 Technology ER -