Litzenberger, S., D.-M. Tran, and F. I. Michel. “Longitudinal Bending Stiffness of Cycling Footwear - What Is Stiff Enough?”. Journal of Science and Cycling, vol. 12, no. 2, Oct. 2023, pp. 44-47, https://www.jsc-journal.com/index.php/JSC/article/view/835.