Z. K. . Zaman and M. R. Hilmi, “THE IMMEDIATE EFFECT OF A PRESERVATIVE HYALURONIC ACID AND CARBOXYMETHYLCELLULOSE SODIUM EYE DROP ON TEAR FILM ASSESSMENT AND SUBJECTIVE RESPONSE”, Inter. J. All. Heal. Sci., vol. 5, no. 3, p. 2268, Jun. 2021.