HAU, W.-L.; TSANG, S.-L.; KWAN, W.; MAN, L. S.-K.; LAM, K.-Y.; HO, L.-F.; CHEUNG, H.-Y.; LAI, F.-K.; LAI, C.-Y.; SIN, W. The Use of Birth Ball as a Method of Pain Management in Labour. Hong Kong Journal of Gynaecology, Obstetrics and Midwifery, [S. l.], v. 12, n. 1, 2023. DOI: 10.12809/hkjgom.12.1.125. Disponível em: https://hkjgom.org/home/article/view/125. Acesso em: 8 may. 2024.