Качан, Ю.Г., Курис, Ю.В. and Левицкая, И.Н. 2009. Mixing processes of the substrate in the biogas plant reactor. Eastern-European Journal of Enterprise Technologies. 2, 4(38) (Apr. 2009), 4–8. DOI:https://doi.org/10.15587/1729-4061.2009.5926.