F. Bajuri, N. Mazlan, M. R. Ishak, and M. K. A. Uyup, “Effect of impregnation on hybrid mesoporous silica / kenaf reinforced epoxy composites in term of flexural, compressive and water absorption properties”, J. Mech. Eng. Sci., vol. 14, no. 4, pp. 7528–7539, Dec. 2020, doi: 10.15282/jmes.14.4.2020.19.0593.