Zi Yan, Yi, Xiang-Guo Li, Xuan-Ji Jin, Yong Kyoung Kim, Md. Romij Uddin, Haeng Hoon Kim, Sun-Ju Kim, and Sang Un Park. “Mineral Contents in the Roots of Blue and White Flowered Platycodon Grandiflorum (Jacq.) A. D.C. From China and Korea”. Asian Journal of Chemistry 25, no. 13 (July 20, 2013): 7103–7105. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_14_9.