Kauffmann, F., Dehm, G., Schier, V., Schattke, A., Beck, T., Lang, S., et al. (2005). Microstructural size effects on the hardness of nanocrystalline TiN/amorphous-SiNx coatings prepared by magnetron sputtering. Thin Solid Films, 473(1), 114-122. doi:10.1016/j.tsf.2004.08.080.