Łoś, P., A. Łukomska, S. Kowalska, R. Jeziórska, and J. Krupka. 2011. “Obtaining and Properties of Polyolefin Composites Metamaterials With Copper Micro- and Nanoflakes”. Polimery 56 (4):324-27. https://ichp.vot.pl/index.php/p/article/view/923.