Brånemark, Per-Ingvar, Ragnar Ekholm, and Ian Goldie. “To the Question of Angiopathy in Rheumatoid Arthritis: An Electron Microscopic Study”. Acta Orthopaedica 40, no. 2 (January 1, 1969): 153–175. Accessed May 3, 2026. https://actaorthop.org/actao/article/view/30003.