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Đông, N.K., Mạnh, L.H. and Huyền Trân, L.T. 2020. Extraction of pectin from watermelon peels for pineapple and aloe vera jam fabrication. Hue University Journal of Science: Natural Science. 129, 1C (Jun. 2020), 69-75. DOI:https://doi.org/10.26459/hueuni-jns.v129i1C.5538.