Alam, Md. Khayrul, Maruf Ahmed, Mst. Sorifa Akter, Nurul Islam, and Jong-Bang Eun. 2009. “Effect of Carboxymethylcellulose and Starch As Thickening Agents on the Quality of Tomato Ketchup”. Pakistan Journal of Nutrition 8 (8): 1144–1149. https://doi.org/10.3923/pjn.2009.1144.1149.