B. Haasdonk, T. Wenzel, G. Santin, and S. Schmitt. Numerical Mathematics and Advanced Applications ENUMATH 2019, page 499--508. Cham, Springer International Publishing, (2021)
D. Haeufle, M. Taylor, S. Schmitt, and H. Geyer. 2012 4th IEEE RAS EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob), page 1614-1619. (June 2012)