Đông, N. K., L. H. Mạnh, and L. T. Huyền Trân. “Extraction of Pectin from Watermelon Peels for Pineapple and Aloe Vera Jam Fabrication”. Hue University Journal of Science: Natural Science, vol. 129, no. 1C, June 2020, pp. 69-75, doi:10.26459/hueuni-jns.v129i1C.5538.