Yang, Jie, Qunfang Zhang, Jia Zhong, Guangyu Yang, Ping Ning, and Qiufen Hu. 2011. “Study on the Separation and Determination of Palladium, Platinum and Rhodium by Solid Phase Extraction and Ultra Performance Liquid Chromatography”. Asian Journal of Chemistry 23 (11):4815-18. https://asianpubs.org/index.php/ajchem/article/view/10989.