YADAV, J.; REGMI, M. C.; BASNET, P.; GUDDY, K.; BHATTARAI, B.; POUDEL, P. Butorphanol in Labour Analgesia. Journal of Nepal Medical Association, [S. l.], v. 56, n. 214, p. 940–944, 2018. DOI: 10.31729/jnma.3905. Disponível em: http://jnma.com.np/jnma/index.php/jnma/article/view/3905. Acesso em: 29 mar. 2024.