Żenkiewicz, M., J. Richert, P. Rytlewski, K. Moraczewski, and M. Stepczyńska. “Selected Properties of Polypropylene Composites With Shungite”. Polimery 55, no. 2 (February 28, 2020): 119–126. Accessed November 21, 2024. https://ichp.vot.pl/index.php/p/article/view/994.