Vanwalleghem, J., I. De Baere, M. Loccufier, and W. Van Paepegem. “Development of a Multi-Directional Rating Test Method for Bicycle Frame Stiffness”. Journal of Science and Cycling, vol. 3, no. 2, Aug. 2014, p. 69, https://jsc-journal.com/index.php/JSC/article/view/138.