Yolkin, K. S., A. V. Sivtsov, D. K. Yolkin, and A. I. Karlina. “Silicon Metallurgy and Ecology Problems”. KnE Materials Science 6, no. 1 (December 31, 2020): 239–242. Accessed September 23, 2021. https://knepublishing.com/index.php/KnE-Materials/article/view/8073.