S. Abdiyeva and R. Turgunbaev, “THEOREMS ON THE NUMBER OF ROOTS OF A CUBIC EQUATION AND THEIR LOCATION AS A MEANS OF DEVELOPING STUDENTS’ VISUAL THINKING”, ФМО, vol. 38, no. 4, pp. 7–13, Sep. 2023, doi: 10.31110/2413-1571-2023-038-4-001.