APA

Trifonov V. A., Grichin S. V. & Kovaleva M. A.Price Differentiation as Economic and Mathematical Model of Increasing the Competitive Power of a Company. : .

Chicago

Trifonov V A, Grichin S V and Kovaleva M A.Price Differentiation as Economic and Mathematical Model of Increasing the Competitive Power of a Company. : .

Harvard

Trifonov V. A., Grichin S. V. and Kovaleva M. A.Price Differentiation as Economic and Mathematical Model of Increasing the Competitive Power of a Company. : .

MLA

Trifonov V A, Grichin S V and Kovaleva M A.: . .