1. Müller R. Über die doppelpunkte der koppelkurve, Zeitschrift für Mathematik und Physik, 1889;34:303–305, 372–375, 1891;36:65–70
2. Müller R. Papers on geometrical theory of motion applied to approximate straight line motion. Kansas State University Bulletin, Special Report No. 21. 1962;46(6)
3. Beyer R. Kinematic Synthesis of Mechanisms, Chapman and Hall, London, 1963:255–266
4. An algorithm to generate the transition curve of the planar four-bar mechanism