A. A. Kovalevskii, “Averaging of integral functionals related to domains of frame-type periodic structure with thin channels”, Ukr. Mat. Zhurn., vol. 52, no. 5, pp. 616–625, May 2000, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4456