TY JOUR TI Tax Considerations within the Legal Regulation of Financial Security for Concession Agreements KW public-private partnership KW concession agreements KW taxation KW budget system KW financial security JO Scientific Research and Development. Economics of the Firm AU Ahmadeev, R.G. AU Morozova, T.V. AU Ivanova, T.A. PY 2026 IS 15 PB INFRA-M Academic Publishing LLC.