NOLLEN, Ad J G; VAN DOUVEREN, Florens Q M P. Ectopic ossification in hip arthroplasty: A retrospective study of predisposing factors in 637 cases. Acta Orthopaedica, [S. l.], v. 64, n. 2, p. 185–187, 1993. DOI: 10.3109/17453679308994567. Disponível em: https://actaorthop.org/actao/article/view/21735. Acesso em: 16 may. 2026.