The Risk Management System as an Enhancement Factor for Investment Attractiveness of Russian Enterprises oleh Anzhela Sergeevna Voskovskaya, Tatiana Anatolievna Karpova, Tatiana Anatolievna Tantsura, Anna Yurievna Shirokih, Olga Yevgenievna Lebedeva, Kostyantyn Anatol’evich Lebedev