Ong, K., and L. Ong. “Avoiding BAK in Postoperative Eye Drops Reduces the Need for Subconjunctival 5-FU Injections Post-Trabeculectomy”. Asian Journal of Ophthalmology, Vol. 17, no. 1, Jan. 2020, pp. 128-31, https://asianjo.com/index.php/AsianJO/article/view/643.