Tretyakov, A.O. “Mathematical Model of Friction Wear Process on the Example of Polymer Composites on the Basis of Phenol-Formaldehyde Resins”. Polimery, vol. 49, no. 4, Sept. 2022, pp. 264-7, https://polimery.ichp.vot.pl/index.php/p/article/view/1749.