TY JOUR TI CURRENT TRENDS, PROBLEMS AND PROSPECTS FOR TAXATION OF SMALL BUSINESSES USING SPECIAL TAX REGIMES IN THE RUSSIAN FEDERATION KW special tax regimes KW taxation of small and medium-sized businesses KW simplified taxation system KW automated system of simplified taxation KW unified agricultural tax KW patent system KW taxes JO Russian Journal of Management AU Suglobov, A.E. AU Minakov, A.V. PY 2026 IS 14 PB Publishing Center RIOR