Dahl, Jon, Finnur Snorrason, Lars Nordsletten, and Stephan M Röhrl. 2013. “More Than 50% Reduction of Wear in Polyethylene Liners With Alumina Heads Compared to Cobalt-Chrome Heads in Hip Replacements”. Acta Orthopaedica 84 (4):360-64. https://doi.org/10.3109/17453674.2013.810516.