Karalus, W., J. R. Dąbrowski, M. Auguścik, and J. Ryszkowska. “Tribological Properties of Biodegradable Polyurethanes of Various Structure and Content of Rigid Elements”. Polimery 61, no. 7-8 (January 24, 2021): 509-518. Accessed July 22, 2024. https://ichp.vot.pl/index.php/p/article/view/417.