HAGEN, Rolf. Pelvic Girdle Relaxation from an Orthopaedic Point of View. Acta Orthopaedica, [S. l.], v. 45, n. 1-4, p. 550–563, 1974. DOI: 10.3109/17453677408989178. Disponível em: https://actaorthop.org/actao/article/view/29668. Acesso em: 13 may. 2026.