Smirnov, A. L., and F. P. J. Rimrott. “Methods of Computer Algebra in the Theory of Shells”. Technische Mechanik - European Journal of Engineering Mechanics, vol. 14, no. 3/4, Oct. 2019, pp. 193-02, https://journals.ub.ovgu.de/index.php/techmech/article/view/1304.