Zheng1, Yan, and Jianbin Zhang2. “Synthesis and Characterizations of Maleate Complex With Iron of Variable Valence”. Asian Journal of Chemistry 26, no. 20 (September 26, 2014): 7052–7054. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_21_73.