Effect of Substrate Surface Roughness on the Tribological Properties of DLC-H Coatings on Tappet Valve - Kolawole, Funsho Olaitan; Kolawole, Shola Kolade; Varela, Luis Bernardo; Kraszczuk, André; Ramírez, Marco Antonio; Tschiptschin, André Paulo (Tribology in Industry, 2021)