Zaulychnyy, Ya.V., V. Ya. Ilkiv, Y. V. Yavorskyi, O. I. Dudka, V.I. Zarko, and M. V. Karpetz. 2015. “Morphology and Energy Distribution of the Valence Electrons After Mechanochemical Activation SiO2 Al2O3 ”. Physics and Chemistry of Solid State 16 (3):501-5. https://doi.org/10.15330/pcss.16.3.501-505.