Lopatin, Alexey. “Intelligent System of Estimation of Total Factor Productivity (TFP) and Investment Efficiency in the Economy With External Technology Gaps”. Journal of Comprehensive Business Administration Research 1, no. 3 (November 19, 2024): 160–170. Accessed February 24, 2026. https://ojs.bonviewpress.com/index.php/JCBAR/article/view/1874.