1. How to apply drag-link mechanisms in the synthesis of mechanisms;Hain,1967
2. The design of the spherical drag-link mechanisms;Soni;Trans. ASME, J. Engng Ind., Series B,1967
3. Die Konstruktion von Gelenkvierecken mit Hilfe von Kurventafeln;Volmer;Maschinenbautechnik,1956
4. An analytical method for synthesizing the four-bar crank-rocker mechanism;Chen;Trans. ASME, J. Engng Ind., Series B,1969