NEDKOV, Stoyan, Miglena ZHIYANSKI, Bilyana BORISOVA, Mariyana NIKOLOVA, BRATANOVA-DONCHEVА Svetla, Lidia SEMERDZHIEVA, Ivo IHTIMANSKI, Petar NIKOLOV, and Zvezdelina AIDAROVA. 2019. “A Geospatial Approach to Mapping and Assessment of Urban Ecosystem Services in Bulgaria”. European Journal of Geography 9 (4). https://www.eurogeojournal.eu/index.php/egj/article/view/54.