Żak, A., E. Golisz, K. Tucki, and P. Borowski. “PERSPECTIVES OF BIOFUEL SECTOR DEVELOPMENT IN POLAND IN COMPARISON TO CO2 EMISSION STANDARDS”. Journal of Agribusiness and Rural Development, Vol. 33, no. 3, Dec. 2014, pp. 299-11, http://www1.up.poznan.pl/jard/index.php/jard/article/view/408.