Nilsson, Lars T., BjÖRn Strömqvist, and Karl-Göran Thorngren. 1989. “Function After Hook-Pin Fixation of Femoral Neck Fractures Prospective 2-Year Follow-up of 191 Cases”. Acta Orthopaedica 60 (5):573-78. https://doi.org/10.3109/17453678909150125.