S. Baloš, B. Pilić, D. Petrović, B. Petronijević, and I. Šarčev, “Flexural strength and modulus of autopolimerized poly(methyl methacrylate) with nanosilica”, Vojnosanit Pregl, vol. 75, no. 6, Nov. 2020, doi: 10.2298/VSP160203359B.