1. Kim YM, Joo YB. Patellofemoral osteoarthritis. Knee Surg Relat Res. 2012;24(4):193–200.
2. 11th Annual Report 2014. National Joint Registry for England, Wales and Northern Ireland. Available at: http://www.njrreports.org.uk/Portals/0/PDFdownloads/NJR%2011th%20Annual%20Report%202014.pdf . Accessed 24 January 2015.
3. Kaufer H. Patellar biomechanics. Clin Orthop Relat Res. 1979;144:51–4.
4. Compere CL, Hill JA, Lewinnek GE, Thompson RG. A new method of patellectomy for patellofemoral arthritis. J Bone Joint Surg. 1979;61(5):714–8.
5. Duthie HL, Hutchinson JR. The results of partial and total excision of the patella. JBJS. 1958;40B:75.