Becker, R., Urbach, D., Grasshoff, H., & Neumann, H. W. (1999). Structural bone grafting in arthroplasty for congenital hip dysplasia: 35 hips followed for 5-10 years. Acta Orthopaedica, 70(5), 430–434. https://doi.org/10.3109/17453679909000976