Brostow, W., V. M. Castańo, and G. Martinez-Barrera. “Gamma Irradiation Effect on Polystyrene + SBR Blends: Morphology and Microhardness”. Polimery, vol. 50, no. 9, Sept. 2022, pp. 657-62, https://ichp.vot.pl/index.php/p/article/view/1673.