1. Performance evaluation of manipulators from a kinematic viewpoint;Roth;NBS Special Publication Performance Evaluation of Programmable Robots and Manipulators,1975
2. Ranges of motion of manipulators;Shimano,1977
3. The workspaces of a mechanical manipulator;Kumar;ASME Jl Mech. Design,1981
4. Accessible region and synthesis of robot arms;Tsai;ASME Jl Mech. Design,1981
5. The effect of link parameters on the working space of general 3R robot arms;Tsai,1981