1. K.J. Astrom, T. Hagglund, PID Controllers: Theory, Design and Tuning, Instrument Society of America, Research Triangle Park, 1995.
2. Revisiting the Ziegler–Nichols step response method for PID control;Astrom;J. Process Control,2004
3. Autodesk, 3d Studio Max Home Page, 2013 (retrieved 12.03.13).
4. A faster than real-time simulator of motion platforms;Casas;Comput. Math. Meth. Sci. Eng.,2012
5. Dynamics analysis of a parallel hip joint simulator with four degree of freedoms (3RT1);Cheng;Nonlin. Dynam.,2013