1. Liu, Chong. 2009. Foundation of MEMS, 301–306. Upper Saddle River: Person education Inc.
2. Rao, Singiresu S. 1995. Mechanical Vibrations, 41Reading Massachusetts: Addison-Wesley Publishing Company.
3. Dimarogonas, Andrew D. 1995. Vibration for Engineers, 83–89. Upper Saddle River: Prentice-Hall Inc.
4. Esposito, Anthony. 2009. Fluid Power with application, 241–245. Upper Saddle River: Person education Inc.