Andrianov, I.V., and G.A. Starushenko. “Asymptotic Methods in the Theory of Perforated Membrane of Nonhomogeneous Structure”. Engineering Transactions 43, no. 1-2 (July 1, 1995): 5–18. Accessed July 13, 2025. https://et.ippt.pan.pl/index.php/et/article/view/1481.