Li, Hui, Guisheng Zeng, and Xinman Tu. “Effect of Ultrasonic Treatment on the Solubility of Sodium Sulphate Using Response Surface Methodology”. Asian Journal of Chemistry 25, no. 11 (June 6, 2013): 6222–6226. Accessed July 18, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_12_81.