N. R. Cholidah, D. S. Wicaksono, L. S. Septiyani, I. Muflihati, and S. Suhendriani, “Pectin Extraction from Pineapple Peel and Its Aplication in Tomato Sauce as Thickening Agent”, at, vol. 16, no. 2, pp. 85–92, Nov. 2023.