GRAF, R; CZUBAK, Jaroslaw; KOTWICKI, Tomasz. Ultrasound measurements of the newborn hip–comparison of two methods in 657 newborns. Acta Orthopaedica, [S. l.], v. 69, n. 5, p. 550–551, 1998. DOI: 10.3109/17453679808997796. Disponível em: https://actaorthop.org/actao/article/view/20682. Acesso em: 9 may. 2026.