M. J. Niemeläinen, “The effect of fixation type on the survivorship of contemporary total knee arthroplasty in patients younger than 65 years of age: a register- based study of 115,177 knees in the Nordic Arthroplasty Register Association (NARA) 2000–2016”, ActaO, vol. 91, no. 2, pp. 184–190, Jan. 2020.