Huang, Lei, Xu Gao, Ming Liu, Gang Du, and Jinsong Guo. “SO2 in Atmosphere Predicted With Improved Error GM (1,1) Model-Based on Optimization of Initial Condition in Chongqing, China”. Asian Journal of Chemistry 25, no. 4 (November 1, 2012): 2031–2034. Accessed July 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_4_59.