Daniela Zlatunova. WATER SECURITY INDEX: AN INTEGRATED WATER MANAGEMENT TOOL (CASE STUDY IN BULGARIA). SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Water Resources. Forest, Marine and Ocean Ecosystems, 2020, pp. 371-378. https://doi.org/10.5593/sgem2020/3.1/s12.048