Struzhanov, Valeriy Vladimirovich, and Elena Aleksandrovna Bakhareva. “Mathematical Methods in the Theory of Pure Bending of Rectangular Beams Made of Weakening Material With Symmetric Stress-Strain Diagram”. Computational Continuum Mechanics, vol. 5, no. 2, July 2012, pp. 158-67, https://doi.org/10.7242/1999-6691/2012.5.2.19.