Duchev, Zhivko, Atila Sedefchev, and Atanas Vuchkov. “Geographic Distribution of the Bulgarian Screw-Horn Longhair Goat Potential Threats to the Population Diversity”. Bulgarian Journal of Agricultural Science 28, no. 6 (December 9, 2022): 1110–1115. Accessed October 22, 2026. https://agriacad.eu/ojs/index.php/bjas/article/view/1920.