Morgunov, E. V., S. V. Chernyavsky, and A. I. Rostovtsev, “ANALYSIS OF THE DYNAMICS OF PER CAPITA GROSS DOMESTIC PRODUCT ACROSS COUNTRIES WITH PRODUCTIVITY DIFFERENCES OVER 1970–2021”, Статьи, Социум и власть, 22/2 (2025), 92-111, https://socium-vlast.owebs.ru/article/view/19329, accessed 8 Nov. 2026.