Hong Li, Tao, Xiao Guang Xie, and Guan Ben Du. “Formation of Methylolureas Under Alkaline Condition: A Theoretical Study”. Asian Journal of Chemistry 25, no. 15 (September 10, 2013): 8317–8323. Accessed November 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_16_17.