Shrestha, Buddha Kumar, Hira Mani Trital, and Armila Rajbhandari. “Synthesis and Characterization of CuO-ZnO Nano Additive for Lubricant”. Scientific World 13, no. 13 (August 5, 2020): 33–36. Accessed January 31, 2026. https://www.nepjol.info/index.php/SW/article/view/30504.