AKHTAR, Nazia. The Effects of Entonox and Epidural Analgesia on Arterial Oxygen Saturation of Women in Labour. Annals of King Edward Medical University, [S. l.], v. 16, n. 3, p. 150, 2011. DOI: 10.21649/akemu.v16i3.215. Disponível em: https://annalskemu.org/journal/index.php/annals/article/view/215. Acesso em: 27 apr. 2024.