1. Rationale of The Knee Society clinical rating system;Insall;Clin Orthop,1989
2. Evaluation of knee ligament surgery results with special emphasis on use of a scoring system;Lysholm;Am J Sports Med,1982
3. Rating systems in the evaluation of knee ligament injuries;Tegner;Clin Orthop,1985
4. Diagnosis of bone and joint disorders;Resnick,1981
5. AO classification of fractures;Müller,1987