Luetrakool, P. “Comparison of End Tidal Carbon Dioxide Level along the Time of Surgery between Pressure Support Ventilation versus Spontaneous Ventilation in General Anesthesia under Laryngeal Mask Airway in Breast Surgery: A Randomized Controlled Trial”. Thai Journal of Anesthesiology, vol. 46, no. 4, Aug. 2020, pp. 211-9, https://he02.tci-thaijo.org/index.php/anesthai/article/view/244892.