Paavolainen, Pekka, Martti Hämäläinen, Helli Mustonen, and PÄR Slätis. “Registration of Arthroplasties in Finland”. Acta Orthopaedica 62, no. sup241 (January 1, 1991): 27–30. Accessed February 23, 2025. https://actaorthop.org/actao/article/view/22287.