Klymenko, O., Gorytski, V., Gutarevych, Y., Shchelkunov, A. and Kyrychenko, R. 2020. Requirements for a unified system of road vehicles environmental labelling and low emission zones. Eastern-European Journal of Enterprise Technologies. 6, 10 (108) (Dec. 2020), 53–64. DOI:https://doi.org/10.15587/1729-4061.2020.217543.