Ma, Yingna, Weiqi Gao, Kun Wu, and Yongping Bao. “Flavonoid Intake and the Risk of Age-Related Cataract in China’s Heilongjiang Province”. Food & Nutrition Research 59 (December 11, 2015). Accessed September 22, 2020. https://foodandnutritionresearch.net/index.php/fnr/article/view/774.