TY JOUR TI SPECIFICATION OF KEY FACTORS OF THE COMPETITIVE ENVIRONMENT AT ADAPTIVE BUSINESS MANAGEMENT ON EXTRACTION OF NON-METALLIC CONSTRUCTION MATERIALS KW non-metallic construction materials KW classification of factors KW sustainable development of the enterprises KW specification of key factors KW competitive environment JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Bekrenev, I.V. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov