Idzior, Marek, et al. “Effect of Emission Measurement of Toxic Exhaust Components of Automotive Vehicles Equipped With Spark-Ignition Engines on the Environment During Mandatory Check Tests at Vehicle Inspection Stations”. AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe, vol. 19, no. 6, June 2018, pp. 478-81, doi:10.24136/atest.2018.116.