1. Modulus Snap-fit Design Manual,1997
2. Mark's Standard Handbook for Mechanical Engineers;Avallone,1996
3. BASF, Snap-fit Design Manual, BASF.com.
4. Snap-fit Joints for Plastics-A Design Guide,1998
5. Bayer Material Science, Thermoplastic Part and Mold Design Guide, bayerplastics.com