Achieving Superlubricity: Development of Multilayer Co-Doped DLC Coatings and Tribological Evaluation with Eco-Friendly Base Oil and Low-SAPS Oil Formulations. - Haneef, Mobeen; Evaristo, Manuel; Yang, Liuquan; Morina, Ardian; Trindade, Bruno (Materials (1996-1944), 2025)