Makar, S., P. Stroev, R. Fattakhov, D. Morkovkin, and O. Pivovarova. “Modern Transformations of Russian Economic Space and Development of Social Infrastructure”. Amazonia Investiga, Vol. 8, no. 23, Oct. 2019, pp. 337-49, https://www.amazoniainvestiga.info/index.php/amazonia/article/view/877.