“Octogenarian With an Untreated Femoral Neck Fracture: Upright Position During the Postoperative Course After Aortic Valve Replacement”. Reumatismo 67, no. 1 (June 30, 2015): 26–28. Accessed June 7, 2025. https://www.reumatismo.org/reuma/article/view/reumatismo.2015.797.