Mahmudova M.M., N. E. N. A. “MATHEMATICAL MODELING OF THE GAS FILTRATION PROCESS IN DIRECTLY CONNECTED THREE-LAYER POROUS MEDIUM LAYERS”. Confrencea, vol. 11, no. 1, Dec. 2023, pp. 12-17, https://confrencea.org/index.php/confrenceas/article/view/1003.