V. Aprilia, A. Murdiati, P. Hastuti, and E. Harmayani, “Carboxymethylation of Glucomannan from Porang Tuber (Amorphophallus oncophyllus) and the Physicochemical Properties of the Product”, Pak. J. Nutr., vol. 16, no. 11, pp. 835–842, Oct. 2017, doi: 10.3923/pjn.2017.835.842.