Ralys, Aurimas, Valdemar Prokopovič, and Vytautas Striška. “Preperation for a Clean Surface”. Mokslas – Lietuvos ateitis / Science – Future of Lithuania 4, no. 6 (February 4, 2013): 550-554. Accessed September 18, 2021. https://journals.vgtu.lt/index.php/MLA/article/view/4618.