@article{chen_yan_zhang_kuang_tang_han_2015,  title={Optimization of Process Variables in the Synthesis of Isoamyl Isovalerate Using Sulfonated Organic Heteropolyacid Salts as Catalysts},  volume={26},  ISSN={0103-5053},  url={https://doi.org/10.5935/0103-5053.20150015},  DOI={10.5935/0103-5053.20150015},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Chen, Keke and Yan, Wei and Zhang, Xiaofang and Kuang, Yingying and Tang, Xiujuan and Han, Xiaoxiang},  year={2015},  month={Mar},  pages={600–608} }