1. Anonymous, Elliptical gears are back and more versatile than ever, Prod. Eng. 43 (August 1972) 34–38.
2. Proportions of elliptic gears for quick return mechanism;Miller;Prod. Eng.,1945
3. N.P. Chironis, Gear Design and Application, McGraw-Hill, New York, 1967.
4. Elliptical gears for irregular motion;Bernett;Mech. Eng.,1967
5. A simplified synthetic design method of pitch curves based on motion specifications for noncircular gears;Katori;Trans. Jpn. Soc. Mech. Eng.,1994