GRETZER, Hellmuth. Swedish Pediatric Orthopedic Society. Acta Orthopaedica, [S. l.], v. 60, n. sup231, p. 1–3, 1989. DOI: 10.3109/17453678909154178. Disponível em: https://actaorthop.org/actao/article/view/22649. Acesso em: 3 may. 2026.