Nikolić, Milan P., Slobodanka Stanojević - Nikolić, Vladimir B. Pavlović, and Vladimir V. Srdić. “The Effect of Silica Nanoparticles Obtained from Different Sources on Mechanical Properties of Polyurethane Nanocomposites”. Engineering TODAY 3, no. 2 (July 4, 2024). Accessed October 14, 2026. https://www.engineering-today.com/index.php/et/article/view/83.