Marin, Edwin, and John Rojas. “PREPARATION AND CHARACTERIZATION OF CROSSLINKED POLY (VINYL) ALCOHOL FILMS WITH WATERPROOF PROPERTIES”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 7, no. 3, Mar. 2015, pp. 242-8, https://www.journals.innovareacademics.in/index.php/ijpps/article/view/4587.