Mucka, P., G. J. Stein, and P. Tobolka. “Errata: Communications - Scientific Letters of the University of Zilina, 21(1), 2019, Passsenger Ride Comfort and International Roughness Index Specifications in the Slovak Republic, P. 15-22.”. Communications - Scientific Letters of the University of Zilina, Vol. 21, no. 2, May 2019, pp. 119-20, http://journals.uniza.sk/index.php/communications/article/view/1477.