Cehla, Béla, Sándor Kovács, M. Wolfová, István Komlósi, and András Nábrádi. 2012. “Factors Influencing the Gross Value Added in the Sheep Production Chain”. Applied Studies in Agribusiness and Commerce 6 (5):141-46. https://doi.org/10.19041/APSTRACT/2012/5/23.