TY JOUR TI STRUCTURAL AND FUNCTIONAL APPROACH AS A METHODOLOGICAL BASIS FOR MODELING URBAN PLANNING SYSTEM OF ECOTOURISM TERRITORIES KW modeling KW urban planning system KW structural and functional approach KW functional model of the territory KW structural model of the territory JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Astanin, D.M. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov