References

1. Gear - Wikipedia. https://en.wikipedia.org/wiki/Gear

2. NPTEL - Machine Design II: Design of Spur Gears. http://nptel.iitm.ac.in/courses/IIT-MADRAS/Machine_Design_II/pdf/2_5.pdf

3. Serope Kalpakjian and Steven Schmid, "Manufacturing Engineering and Technology", Pearson Education, 2009.

4. Taylan Altan, Gracious Ngaile, Gangshu Shen, "Cold and hot forging: fundamentals and applications", Volume 1, ASM International, 2004.