Mohammad Suffian James, Redzuan, et al. “Preparation and Characterization of Polyvinyl Alcohol Carboxymethyl Cellulose Films With Citric Acid and Activated Carbon for Active Food Packaging”. BioResources, vol. 21, no. 3, May 2026, pp. 6163-7, https://ojs.bioresources.com/index.php/BRJ/article/view/25100.