Afanasev, Aleksandr Alekseevich, Vitaliy Fedorovich Kasyanov, Inessa Galeevna Lukmanova, and Dmitriy Nokolaevich Silka. 2015. “Synchronization of Processes Related to Economic Activity With Stages of Development of Spatially-Organized Systems”. International Journal of Economics and Financial Issues 5 (3S):121-24. https://www.econjournals.com/index.php/ijefi/article/view/1700.