Fu, Yong-Qian, Hua-Yue Zhu, Ru Jiang, Long-Fei Yin, Qi-Cheng Ruan, and Shi-Bin Ren. 2013. “Influence of PH on Fumaric Acid Adsorption by Basic Ion-Exchange Resins”. Asian Journal of Chemistry 25 (7):3749-54. https://doi.org/10.14233/ajchem.2013.13744.