Benjawan Chaichua และ Sirilux Poompradub. (2008) Natural rubber reinforced by in situ silica generated in rubber solution by sol-gel process. Chulalongkorn University:ม.ป.ท.Benjawan Chaichua และ Sirilux Poompradub. 2008. Natural rubber reinforced by in situ silica generated in rubber solution by sol-gel process. ม.ป.ท.:Chulalongkorn University;Benjawan Chaichua และ Sirilux Poompradub. Natural rubber reinforced by in situ silica generated in rubber solution by sol-gel process. ม.ป.ท.:Chulalongkorn University, 2008. Print.