TojiyevP.J, TuraevH.Kh, NuralievG.T, and DzhalilovA.T. “Structure And Properties Of Polypropylene Filled With Metal Oxide Fillers”. Texas Journal of Engineering and Technology, vol. 12, Sept. 2022, pp. 37-41, https://zienjournals.com/index.php/tjet/article/view/2376.