Hashim, A. Z. . “Extraction and Characterization of Pectin from Dragon Fruit (Hylocerens Polyrhizus) Peel Using Different Concentration of Ammonium Oxalate”. Basrah Journal of Agricultural Sciences, vol. 31, no. 1, Apr. 2018, pp. 12-19, doi:10.37077/25200860.2018.70.