หะรารักษ์ ก. (2017) “The Study of Nasolacrimal duct Obstruction Patients Treated at Takuapa Hospital, 4 years’ experience”, Region 11 Medical Journal, 31(2), pp. 317–323. available at: https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/170288 (accessed: 20 September 2026).