Positioning of total knee arthroplasty with and without navigation support A prospective, randomised study M. Sparmann, B. Wolke, H. Czupalla, D. Banzer, A. Zink August 2003 – The Bone & Joint Journalhttp://www.bjj.boneandjoint.org.uk/ Results after distal Austin and proximal displacement osteotomy: therapy for hallux valgus Foot and Ankle Surgery M. Sparmann, B. Wolke Juni 2002 – Wiley Online Libraryhttp://onlinelibrary.wiley.com/ Die Arthrodese des proximalen Interphalangealgelenkes in der Feder-Nut-(Peg-in-hole-) Technik Operative Orthopädie und Traumatologie M. Sparmann, B. Wolke Dezember 1999 – Springer International Publishing AGhttp://link.springer.com/