TRAKARNPRUK, W., and N. APIPANYASOPON. “Syndiotactic Polystyrene Synthesis Using Polymer-Supported Titanocene Catalysts”. Journal of Metals, Materials and Minerals, vol. 12, no. 2, Aug. 2022, pp. 19-26, https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1282.