Ivanov, P. S., O. F. Lesun, M. M. Bukin, O. O. Petrov, O. O. Churashov, M. H. Shulepova, M. I. Zaitsev, and O. V. Radionov. “CLASSIFICATION OF RAIL DEFECTS”. Science and Transport Progress, no. 8, Sept. 2005, pp. 156-60, doi:10.15802/stp2005/20185.