Cherniega, N. V., A. D. Kudryavtseva, M. I. Samoylovich, BelyaninА. F., and КleschevaS. М. “Optic Acoustic Effects in Lattice Packings (opal Matrices As Metamaterial)”. Technology and Design in Electronic Equipment, no. 1, Feb. 2010, pp. 49-57, https://www.tkea.com.ua/index.php/journal/article/view/TKEA2010.1.49.