Nelles, J. , Kohns, S. , Spies, J. , Schmitz-Buhl, F. , Thietje, R. , Brandl, C. , Mertens, A. , Schlick, C. (2017). 'Analysis of Stress and Strain in Head Based Control of Cooperative Robots through Tetraplegics'. World Academy of Science, Engineering and Technology, Open Science Index 121, International Journal of Health and Medical Engineering, 11(1), 11 - 22.