Jumambayev, Seisembay, Almazhan Dzhulaeva, Sariya Baimukhanova, Guliya Ilyashova, and Aidana Dosmbek. “Global Income Inequality – A Case Study of OECD Countries and Kazakhstan”. Comparative Economic Research. Central and Eastern Europe 25, no. 4 (December 16, 2022): 179–203. Accessed December 10, 2025. https://www.czasopisma.uni.lodz.pl/CER/article/view/15757.