Herberts, P., and G. B. J. Andersson. “Freeman-Swanson Arthroplasty of the Knee in Rheumatoid Arthritis: A 2–7 Year Experience”. Acta Orthopaedica, vol. 53, no. 4, Jan. 1982, pp. 641-9, doi:10.3109/17453678208992271.