Comparative study of quality of subarachnoid blocks for caeasarean section by using bupivacaine alone & bupivacaine - fentanyl combination. Journal of the Bangladesh Society of Anaesthesiologists, [S. l.], v. 22, n. 2, p. 61–65, 2014. DOI: 10.3329/jbsa.v22i2.18144. Disponível em: https://banglajol.info/index.php/JBSA/article/view/18144. Acesso em: 30 jun. 2026.