Rattanapan, S., J. Artchomphoo, and D. Saijun. “The Use of a Co-Filler Between Silica and Crumb Rubber in Natural Rubber Latex Foam Products”. Burapha Science Journal, vol. 26, no. 1 January-April, Mar. 2026, pp. 90-104, https://li05.tci-thaijo.org/index.php/buuscij/article/view/1452.