Okano, Kunihiko, et al. “Outcome of Rotational Acetabular Osteotomy for Early Hip Osteoarthritis Secondary to Dysplasia Related to Femoral Head Shape: 49 Hips Followed for 10–17 Years”. Acta Orthopaedica, vol. 79, no. 1, Jan. 2008, pp. 12-17, doi:10.1080/17453670710014699.