Niinimäki, T. et al. 2010. The standing fixed flexion view detects narrowing of the joint space better than the standing extended view in patients with moderate osteoarthritis of the knee. Acta Orthopaedica. 81, 3 (Jun. 2010), 344–346. DOI:https://doi.org/10.3109/17453674.2010.483989.