Jiang, Xiaoyan, and Ying Tang. “Synthesis and Application of 2,3-Dihydroxybutanedioic Acid Esters As Efficient Additives in Methanol-Gasoline”. Asian Journal of Chemistry, vol. 25, no. 15, Sept. 2013, pp. 8451-4, doi:10.14233/ajchem.2013.14780.