Havelin, L. I., Vollset, S. E., & Engesæter, L. B. (1995). Revision for aseptic loosening of uncemented cups in 4,352 primary total hip prostheses: A report from the Norwegian Arthroplasty Register. Acta Orthopaedica, 66(6), 494–500. https://doi.org/10.3109/17453679509002301