HoangL. K., ChatterjeeM., NguyenK. T., and NguyenD. A. “Classifying Countries in Terms of Government Expenditure: A Multi-Criteria Approach”. HSE Economic Journal, Vol. 25, no. 4, Mar. 2021, pp. 610-27, doi:10.17323/1813-8691-2021-25-4-610-627.