Dimitar B. Nikolov, Cvetan Dimitrov. "STUDY OF THE INFLUENCE OF THE NORTH-ATLANTIC OSCILLATION ON THE SNOW COVER CONDITIONS IN BULGARIA." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Energy and Clean Technologies, 2021, pp. 345-352. https://doi.org/10.5593/sgem2021/4.1/s19.58