Dung, V. K., N. T. Xuan Sam, N. T. Thu Huong, and D. T. Thu. “Conditions of Limited Hydrolysis Producing Pectic Oligosaccharides (pos) of High Concentration Passion Fruit Pectin”. Academia Journal of Biology, vol. 37, no. 1se, Apr. 2015, pp. 99-104, doi:10.15625/0866-7160/v37n1se.6057.