UPADHYAY, D.; PALAIAN, S.; KISHORE, P.; PAUDEL, R.; PRABHU, M.; SHANKAR, P.; MISHRA, P. Tramadol. Journal of Institute of Medicine Nepal, [S. l.], v. 28, n. 3, p. 57–61, 2007. Disponível em: https://nepjol.info/index.php/JIOM/article/view/633. Acesso em: 19 may. 2024.