SLAVOVA, Stanimira; STAYKOVA, Genoveva; LALEVA, Staika; POPOVA, Yovka; SLAVOVA, Petya. Economic effect evaluation of rearing sheep of the Copper-red Shumen breed. Bulgarian Journal of Agricultural Science, Sofia, BG, v. 26, n. 4, p. 726–730, 2020. Disponível em: https://agriacad.eu/ojs/index.php/bjas/article/view/2585.. Acesso em: 19 oct. 2026.