Shiryaev, Dmitry V., Inna L. Litvinenko, Natalya V. Rubtsova, Eugeny P. Kolpak, Viktor A. Blaginin, and Elena N. Zakharova. 2016. “Economic Clusters As a Form of Self-Organization of the Economic System”. International Journal of Economics and Financial Issues 6 (1S):284-88. https://econjournals.com/index.php/ijefi/article/view/2400.