W. C. Verra, L. G. H. van den Boom, W. C. H. Jacobs, J. W. Schoones, A. B. Wymenga, and R. G. H. H. Nelissen, “Similar outcome after retention or sacrifice of the posterior cruciate ligament in total knee arthroplasty”, ActaO, vol. 86, no. 2, pp. 195–201, Mar. 2015.