Sangsungnern, P., I. Kochhirun, V. Thincheelong, N. Phoesri, S. Nonphiaraj, S. Sucher, and S. Sucher. “A Randomized Control Trial of Hyoscine N-Butylbromide versus Lidocaine Pretreatment for Alleviating Pain on Propofol Injection”. Thai Journal of Anesthesiology, vol. 48, no. 4, Oct. 2022, pp. 259-64, https://he02.tci-thaijo.org/index.php/anesthai/article/view/259541.