Groover, M. P.(2008). Automation, production systems, and computer integrated manufacturing (3rd ed.). New Jersey: Prentice Hall. (TSDAS Digital Library: TS183 Groo)

Groover, M. P.(2001). Fundamentals of modern manufacturing: Materials, processes, and systems (2nd ed.). New Jersey: Prentice Hall. (TSDAS Digital Library: TS183 Gro)