Pawlak, A., J. Morawiec, E. Piorkowska, and A. Galeski. “Nanocomposites of Polypropylene and Polyethylene With Montmorillonite Type Clays”. Polimery, vol. 49, no. 4, Sept. 2022, pp. 240-7, https://ichp.vot.pl/index.php/p/article/view/1746.