Kowal, J., B. Czajkowska, A. Żmihorska-Gotfryd, J. Otfinowski, A. Więcek, A. Wierzbicka, and J. Wojewoda. “Oxidation and Degradation of Polyethylene Cups in Hip Joint Prostheses”. Polimery, vol. 48, no. 7-8, Sept. 2022, pp. 537-9, https://ichp.vot.pl/index.php/p/article/view/1894.