Chechkin, Gregory A., Yulia O. Koroleva, Lars-Erik Persson, and Peter Wall. “A New Weighted Friedrichs--Type Inequality for a Perforated Domain With a Sharp Constant”. Eurasian Mathematical Journal 2, no. 1 (May 26, 2024). Accessed October 5, 2024. https://emj.enu.kz/index.php/main/article/view/70.