Stołtny, Bartosz, Grzegorz Peruń, Jarosław Kozuba, Tomasz Wojnar, and Adam Stołtny. “An Evaluation of the Technical Condition of the ROTAX 912S Engine Based on Spectrographic Oil Analysis”. Safety & Defense 8, no. 2 (December 15, 2022): 18-26. Accessed April 19, 2024. https://sd-magazine.eu/index.php/sd/article/view/181.