Solis Romero, J., A. Medina Flores, O. Roblero Aguilar, and J. Oseguera Peña. 2013. “Tribological Evaluation of Plasma Nitride H13 Steel”. Superficies Y Vacío 26 (4):131-38. https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/154.