1. Broach Tool Chip Remover, United States Patent, Patent Number: 5,197,837, US005197837A, Date of Patent: 9/ 1988, Inventor: Paul Brown, Columbus, Ohro
2. Broach Cleaner. Application Filed: June 8,1922. Serial No. 566,777. Inventor: W. Ferris, 1,507,111,
3. Mayank Dev Singh, Shah Saurabh K, Patel Sachin B, Patel Rahul, “To improve productivity by using work study and design a fixture in small scale industry”, International Journal on Theoretical and Applied Research in Mechanical Engineering 2319 – 3182, Volume-1, Issue-2, 2012.
4. Khalid S. Al-Saleh, “Productivity improvement of a motor vehicle inspection station using motion and time study techniques”, Journal of King Saud University – Engineering Sciences (2011) 23, 33–41.
5. Hannu Rantanen, ‟Internal obstacles restraining productivity improvement in small Finnish industrial enterprises”, Int. J. Production Economics 69 (2001) 85-91.