Sikder, M. B. H., and S. Ahmed. “Extraction, Characterization and Application of Three Varieties of Citrus Limon L. Pectin in Jelly Product”. Food and Applied Bioscience Journal, vol. 7, no. 1, Nov. 2018, pp. 31-50, https://li01.tci-thaijo.org/index.php/fabjournal/article/view/137356.