HASSAB, H. K.; EL-SHERIF, A. S. Drilling of the Os-Calcis for Painful Heel with Calcanean Spur. Acta Orthopaedica, [S. l.], v. 45, n. 1-4, p. 152–157, 1974. DOI: 10.3109/17453677408989133. Disponível em: https://actaorthop.org/actao/article/view/29580. Acesso em: 8 may. 2026.