CHARLES, JULIE, and G.R. RAMKUMAAR. “FTIR and Thermal Studies on Polyethylene Terephthalate and Acrylonitrile Butadiene Styrene”. Asian Journal of Chemistry, vol. 21, no. 6, Mar. 2010, pp. 4389-98, https://asianpubs.org/index.php/ajchem/article/view/18177.