Boonthong, W., A. Pornpaiboonsuk, and P. Paoprasert. “Interpenetrating Polymerization of Styrene in Polypropylene and Poly(Ethylene Terephthalate) Using Microwave Irradiation”. Thai Journal of Science and Technology, vol. 7, no. 6, Dec. 2018, pp. 567-80, doi:10.14456/tjst.2018.53.