Tarinee Nampitch, and Polchit Buakaew. “The Effect of Process Factors on the Mechanical Properties of Styrene-NR Elastomers Containing Natural Rubber-Graft- Polystyrene”. Agriculture and Natural Resources, vol. 40, no. 6 (Suppl.), Dec. 2006, pp. 1-6, https://li01.tci-thaijo.org/index.php/anres/article/view/244008.