SHOKUHI RAD, A., and M. ARDJMAND. “Use and Effect of Si Silica Nano Materials in Polyurethane’s Structure”. Asian Journal of Chemistry 21, no. 5 (March 30, 2010): 3313–3333. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/17301.