TY - CPAPER AU - Yordan Dimitrov TI - HYDROLOGICAL DROUGHT FREQUENCY AND CHARACTERIZATION OF THE BULGARIAN YANTRA RIVER HEADWATERS T2 - 25th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2025, Water Resources, Forest, Marine, and Ocean Ecosystems, Vol25, Issue 3.1 PY - 2025 SP - 123 EP - 132 DO - 10.5593/sgem2025/3.1/s11.16 PB - STEF92 Technology ER -