Olisakwe, Sunday Isaac, Azubike J. Ekpunobi, and Peter I. Ekwo. “Effect of Velocity on Nanotribiology of Silicon (Si), Germanium (Ge) and Tin (Sn)”. Asian Journal of Applied Sciences 2, no. 5 (October 15, 2014). Accessed April 25, 2024. https://www.ajouronline.com/index.php/AJAS/article/view/1143.