1. Astronomical large Ge immersion grating by Canon
2. Ge immersed grating manufacturing and optical verification for the METIS high-resolution spectrograph
3. Je, T. J., Lee, J. C., Choi, H., Lee, E. S., (2003), Studies of micro groove mold machining using by diamond cutting tool, Proceedings of the Korean Society of Manufacturing Process Engineers Conference, 125-129.
4. Analysis of Surface Characteristics and Spoke-shaped Removal through Ultra-precision Machining of Germanium Materials
5. Ham, J. K., (2023), Process optimization for ultra precision machining of germanium using a laser assisted module and magnetorheological finishing, M.S. Thesis, Hanbat University.