PANADANABIONA, S. C. Alterations in aminergic system of rat brain by the opioid analgesic tramadol in the absence of pain-induction. International Journal of Basic & Clinical Pharmacology, [S. l.], v. 6, n. 12, p. 2774–2782, 2017. DOI: 10.18203/2319-2003.ijbcp20175161. Disponível em: https://www.ijbcp.com/index.php/ijbcp/article/view/2124. Acesso em: 23 oct. 2025.