1. Mathematical Handbook for Scientists and Engineers;Korn,1968
2. IMSL, IMSL MATH/LIBRARY: User's Manual, MALB-USM-UNBND-EN8901-1.1, 2500, Citynest Bl., Houston, Texas, 1989
3. Theory of Gearing (in Russian);Litvin,1968
4. Gear Geometry and Applied Theory;Litvin,1994
5. F.L. Litvin, Theory of Gearing, NASA Reference Publication, 1989, p. 1212