V. Kolchunov and S. Bulkin, “CALCULATION SCHEME OF REINFORCED CONCRETE STRUCTURES OF CIRCULAR CROSS-SECTION UNDER BENDING WITH TORSION”, IJCCSE, vol. 17, no. 3, pp. 63–82, Sep. 2021, doi: 10.22337/2587-9618-2021-17-3-63-82.