Li, E., A. Cheng, and H. Yuen. “Non-Surgical Management of Lacrimal Canaliculitis Following Insertion of SmartPlug”. Asian Journal of Ophthalmology, Vol. 13, no. 3, Apr. 2014, pp. 111-4, https://www.asianjo.com/index.php/AsianJO/article/view/134.