MAGNUCKI, Krzysztof, et al. “A Shear Deformation Theory of Beams With Bisymmetrical Cross-Sections Based on the Zhuravsky Shear Stress Formula”.
Engineering Transactions, vol. 68, no. 4, Nov. 2020, pp. 353–370,
https://doi.org/10.24423/EngTrans.1174.20201120.