Pongraweewan, Orawan, Panate Pukrittiyakamee, Tachawan Jirativanont, Aphichat Suphathamwit, Pimpisa Konateerakul, and Phatcharakamon Mahothorn. 2020. “The Efficacy of Risperidone in Reducing the Incidence of Postoperative Delirium in Vascular Surgery Patients: Preliminary Report of a Randomized Controlled Trial”. Thai Journal of Anesthesiology 47 (1):23-29. https://he02.tci-thaijo.org/index.php/anesthai/article/view/247118.