Boesenach, B., van der Heide, H. J., & Nelissen, R. G. (2011). No improvement in long-term wear and revision rates with the second-generation Biomet cup (RingLoc) in young patients. Acta Orthopaedica, 82(6), 664–668. https://doi.org/10.3109/17453674.2011.636672