T. K. . Rostovskaya, A. Sagynbayeva, and E. . Suleymanli, “A Comparative Analysis of the Organization of Turkic States: Population Size and Birth Rate as Indicators of Demographic Sustainability”, НИТ, no. 3, pp. 407–420, Sep. 2025, doi: 10.25178/nit.2025.3.24.