Kiseleva, Elena M., Nina N. Danilenko, Amil M. Maharramov, Nadejda N. Martyinenko, and Sergey V. Kireev. 2016. “The Social Significance of the Cluster in the Economy”. International Journal of Economics and Financial Issues 6 (2S):290-93. https://econjournals.com/index.php/ijefi/article/view/2565.