JAMALE, P. B.; SHARMA, S.; GAUTAM, A.; KALE, D.; HEPALGAONKAR, A. A COMPARISON OF EPIDURAL BUTORPHANOL AND FENTANYL FOR POSTOPERATIVE ANALGESIA USING COMBINED SPINAL EPIDURAL ANAESTHESIA TECHNIQUE. UTTAR PRADESH JOURNAL OF ZOOLOGY, [S. l.], v. 41, n. 24, p. 50–55, 2021. Disponível em: https://www.mbimph.com/index.php/UPJOZ/article/view/1837. Acesso em: 4 jul. 2025.