TY JOUR TI SYSTEM TAX PLANNING OF ECONOMIC ENTITIES: THEORETICAL APPROACHES, METHODOLOGICAL ASPECTS AND PRACTICE-ORIENTED TOOLS KW tax relations KW taxes and taxation KW tax planning KW analysis and optimization of the tax base KW tax risks JO Russian Journal of Management AU Grabova, O.N. AU Suglobov, A.E. PY 2019 IS 7 PB Publishing Center RIOR