Rokosz, Krzysztof, Tadeusz Hryniewicz, Steinar Raaen, and Winfried Malorny. 2017. “Fabrication and Characterisation of Porous Coatings Obtained by Plasma Electrolytic Oxidation”. Journal of Mechanical and Energy Engineering 1 (1), 23-30. https://jmee.tu.koszalin.pl/ojs/index.php/jmee/article/view/35.