Comparative study between transdermal buprenorphine patch with intravenous tramadol for post-operative analgesia in laparotomy cases. Asian Journal of Pharmaceutical and Health Sciences, [S. l.], v. 7, n. 1, p. 1613–1617, 2017. DOI: 10.5530/m7vc4j41. Disponível em: https://ajphs.com/index.php/ajphs/article/view/306. Acesso em: 10 jan. 2026.