4S. L. Chang, C. B. Tsay. Computerized tooth profile generation and undercutting analysis of noncircular gear menufactured wih shaper cutters[ J]. ASME,J. Mech. DES. 120( 1998 )92 - 99.
5Katori. H, Hayashi. T. Simplified synthetic desingn method of pitch curves and tooth profiles for noncircular gears [ A ]. Prec.1989 Int Power Transm Gearing Conf[C]. New Technol Power Transm 90. 527- 532.