G/Tsadik, M. ., and D. . Tilahun. “EXTENT OF ADHESION LOSSES IN THE WHEEL-RAIL CONTACT UNDER CONTAMINATED CONDITIONS”. Zede Journal of Ethiopian Engineers and Architects, vol. 34, Feb. 2023, pp. 36-46, http://ejol.aau.edu.et/index.php/ZEDE/article/view/6505.