Hoikka, V., Schlenzka, D., Wirta, J., Paavilainen, T., Eskola, A., Santavirta, S., & Lindholm, T. S. (1993). Failures after revision hip arthroplasties with threaded cups and structural bone allografts: Loosening of 13/18 cases after 1–4 years. Acta Orthopaedica, 64(4), 403–407. https://doi.org/10.3109/17453679308993654