Nurrulhidayah Ahmad Fadzillah, Rashidi Othman, Norazian Mohd. Hassan, Ainaa Eliah Abu Bakar, NurHidayahNoh , and Noraini Mahmad, “Bioactivity and Stability Studies of Betalain-Containing Extracts from Beta vulgaris L”., J. Pharm. Nutr. Sci., vol. 9, no. 2, pp. 81–86, Apr. 2019.