1. Singularity-free spheres in the position and orientation workspaces of Stewart platform manipulators;A Nag;Mechanism and Machine Theory,2021
2. Workspace Analysis of Stewart-Gough-Type Parallel Manipulators;F Pernkopf;Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science,2006
3. A survey of attitude representations;M D Shuster;The Journal of the Astronautical Sciences,1993