Ibyatov, F., Y. Lebedeva, M. Stadolin, M. Cherkasova, and E. Khmelchenko. “Improving the Quality of Management of Private Corporate Structures at Different Levels of Government and Management”. Amazonia Investiga, Vol. 8, no. 23, Oct. 2019, pp. 749-58, https://amazoniainvestiga.info/index.php/amazonia/article/view/930.