Ullmark, Gösta, Kent Sundgren, Jan Milbrink, Olle Nilsson, and Jens Sörensen. 2012. “Metabolic Development of Necrotic Bone in the Femoral Head Following Resurfacing Arthroplasty”. Acta Orthopaedica 83 (1):22-25. https://doi.org/10.3109/17453674.2011.641108.