Ketamine in prevention of pain during propofol injection. International Journal of Biomedical Research, [S. l.], v. 7, n. 3, p. 118–121, 2016. DOI: 10.7439/ijbr.v7i3.2946. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/2946. Acesso em: 29 mar. 2026.