Lepot, N., M. K. Bael van, H. Rul van den, R. Peeters, J. Mullens, and D. Franco. “Nanoparticles of G-Al2O3 As Persperctive Fillers of Thermoplastic Polymers Improving Their Barrier Properties”. Polimery, vol. 51, no. 9, Aug. 2022, pp. 662-4, http://ichp.vot.pl/index.php/p/article/view/1567.