1. Bair, B. W. and Tsay, C. B., ZK-Type Dual-Lead Worm and Worm Gear Drives: Geometry, ASME Journal of Mechanical Design, Vol. 120 (1998), pp. 414-421.
2. Buckingham, E. K., Here’s How to Design Full and Semi-Recess Action Gears, Gear Design and Application, Edited by N. P. Chironis, Product Engineering Magazine (1971a), pp. 136-143, McGraw-Hill, New York.
3. Buckingham, E. K., 3 Are Familiar, 3 Little Known in this Guide to Worm Gear Types, Gear Design and Application, Edited by N. P. Chironis, Product Engineering Magazine (1971b), pp. 69-78, McGraw-Hill, New York.
4. Chang, S. L., and Tsay, C. B., Computerized Tooth Profile Generation and Undercut Analysis of Noncircular Gears Manufactured with Shaper Cutters, ASME Journal of Mechanical Design, Vol. 120, No. 1 (1998), pp. 92-99.
5. Chang, S. L., Tsay, C. B., and Wu, L. I., Mathematical Model and Undercutting Analysis of Elliptical Gears Generated by Rack Cutters, Mechanism and Machine Theory, Vol. 31, No. 7 (1996), pp. 879-890.