1. Kinematic Geometry of Mechanisms;Hunt,1978
2. Curvature Theory in Plane Kinematics;Veldkamp,1963
3. Motion Geometry of Mechanisms;Dijksman,1976
4. Plane Algebraic Curves;Primrose,1955
5. Envelopes and line-loci from the planar four-bar linkage—Introductory theory and applications;Hunt,1979