Yahyazadaeh, Nargess, et al. “Synthesis and Characterization of Graft Copolymerization of Methyl Methacrylate 2-Hydroxy Propyl Methacrylate onto Poly(ethylene Terephthalate) Fibers With 4,4-Azobis(4-Cyano Valeric Acid)”. Asian Journal of Chemistry, vol. 28, no. 8, Apr. 2016, pp. 1734-8, doi:10.14233/ajchem.2016.19808.