Mingaleva, Z., I. Baurzhan, and J. Assel. “Regional Aspects of Banks Activity: Comparative Analysis of International Operation of Russian and Kazakh Banks”. International Journal of Economics and Financial Issues, vol. 6, no. 2S, June 2016, pp. 202-6, https://www.econjournals.com/index.php/ijefi/article/view/2552.