Fisseha, Desalew, Mequanent Mulugeta, and Esayas Gebreyouhannes. “OPTIMAL DESIGN AND ANALYSIS OF PRE-STRESSED CONCRETE SLEEPERS”. Zede Journal of Ethiopian Engineers and Architects 34 (February 8, 2023): 1–9. Accessed April 4, 2025. https://ejol.aau.edu.et/index.php/ZEDE/article/view/6494.