Zhang, Jianbin, et al. “Absorption of Dilute Sulfur Dioxide in Aqueous Poly-Ethylene Glycol 200 Solutions at 298.15 K and 122.60 KPa”. Asian Journal of Chemistry, vol. 24, no. 10, May 2012, pp. 4729-32, https://asianpubs.org/index.php/ajchem/article/view/9598.