L. L. Igonina, R. A. Nabiyev, M. G. Alimirzoeva, G. A. Gulmagomedova, and M. M. Suleymanov, “Reforming of Regional Fiscal Policy as Basis of Increasing Taxation Potential of Territories”, IJEFI, vol. 6, no. 4, pp. 1560–1569, Oct. 2016.