Reikerås, Olav, and Ingjald Bjerkreim. 1982. “Idiopathic Increased Anteversion of the Femoral Neck: Radiological and Clinical Study in Non-Operated and Operated Patients”. Acta Orthopaedica 53 (6):839-45. https://doi.org/10.3109/17453678208992836.