Li, Mengmeng, Xinyi Li, and Hui Zhang. “Esterification Catalytic over Imidazolium Ionic Liquid Modified Salt of phosphotungstic Acid catalyst”. Cambridge Science Advance 2024, no. 2 (June 4, 2024): 18–25. Accessed May 17, 2025. https://www.cambridgepublish.com/csa/article/view/11.