Rochel, Maciej, and Paulina Szabłowska. “Design Principles for Level Crossings in the Light of the Amendment to the National Regulations”. AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe, vol. 20, no. 1-2, Feb. 2019, pp. 497-01, doi:10.24136/atest.2019.094.