Бальковський, П. В., С. Й. Ковалишин, and І. М. Флис. “Technical and Economic Assessment of the Project Environment for the Production Biodyzellya of Rape in Ukraine”. Eastern-European Journal of Enterprise Technologies, vol. 1, no. 6(49), Feb. 2012, pp. 51-53, doi:10.15587/1729-4061.2011.2388.