Dzhumagulova, K., T. Ramazanov, R. Masheeva, G. Gabdullina, and Z. Donco. “Investigation of Spectral Function of Dust Particles”. Recent Contributions to Physics, vol. 2014, no. 4, Dec. 2014, pp. 36-41, https://bph.kaznu.kz/index.php/zhuzhu/article/view/846.