Vanegas-Useche, Libardo Vicente, Juan Felipe Arroyave Londoño, and Magd M. Abdel-Wahab. “Effect of the Normal Force Upon the Friction Coefficient Between Two Solid Surfaces”. Entre ciencia e ingeniería 5, no. 10 (December 23, 2011): 75–92. Accessed November 6, 2026. https://revistas.ucp.edu.co/index.php/entrecienciaeingenieria/article/view/720.