Jalovaara, Pekka, and Heikki Virkkunen. “Quality of Life After Primary Hemiarthroplasty for Femoral Neck Fracture: 6-Year Follow-up of 185 Patients”. Acta Orthopaedica, vol. 62, no. 3, Jan. 1991, pp. 208-17, doi:10.3109/17453679108993594.