1. R Sangamesh Deepak and G K Ananthasuresh, James Watt and his Linkages, Resonance, Vol.14, No.6, pp.530–543, 2009.
2. F Freudenstein, Design of Four-link Mechanisms, PhD Thesis, Columbia University, USA, 1954.
3. F Freudenstein, An Analytical Approach to the Design of Four-Link Mechanisms, ASME Trans., Vol.76, No.3, pp.483–492, April 1954.
4. F Freudenstein, Approximate Synthesis of Four-Bar Linkages, ASME Trans., Vol.77, No.8, pp.853–861, August 1955.
5. G Gogu, Mobility of Mechanisms: A Critical Review, Mechanism and Machine Theory, Vol.40, No.9, pp.1068–1098, 2005.