9Jeong Kwang - Seop, Dai Gil Lee. Development of the composite flexspline for a cycloid - type harmonic drive using net shape manufacturing method.Composite Structure 32 (1995) 557 - 565.
10Jeong Kwang-Seop. A Study on the Composite Flexspline for a Harmonic Drive: Design, Manufacturing and Evaluation. Ph. D. Thesis, 1995.