Laohakittikul, C., S. Srirompotong, and P. Kasemsiri. “Botulinum Toxin Treatment in Parotid Sialocele and Parotid Sialocutaneous Fistula”. Srinagarind Medical Journal, vol. 37, no. 2, Apr. 2022, pp. 105-11, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/253170.