1. Aglietti, P., Insall, JN. and Cerulli, G. Patellar pain and incongruence. I. Measurements of incongruence.;Clin Orthop Relat Res,1983
2. Grelsamer, RP., Dubey, A. and Weinstein, CH. Men and women have similar Q angles: a clinical and trigonometric evaluation.;J Bone Joint Surg Br,2005
3. Guerra, JP., Arnold, MJ. and Gajdosik, RL. Q angle: effects of isometric quadriceps contraction and body position.;J Orthop Sports Phys Ther,1994
4. Horton, MG. and Hall, TL. Quadriceps femoris muscle angle: normal values and relationships with gender and selected skeletal measures.;Phys Ther,1989
5. Hsu, RW., Himeno, S., Coventry, MB. and Chao, EY. Normal axial alignment of the lower extremity and load-bearing distribution at the knee.;Clin Orthop Relat Res,1990