Popp, J. ., M. . Harangi-Rákos, K. . Pető, and . A. . Nagy. “Bioenergy: Risks to Food-, Energy- and Environmental Security”. Applied Studies in Agribusiness and Commerce, vol. 7, no. 4-5, Dec. 2013, pp. 121-30, doi:10.19041/APSTRACT/2013/4-5/17.