Tran TL, Ta TT, Hoang TNM, Nguyen TT. Permeability calculation based on grain size analysis for hydrogeological geotechnical investigation of Van Cao - Hoa Lac metro line. J. Water Resour. Environ. Eng. 2025;(97):91-96. Accessed November 13, 2026. https://thuyloi.vojs.vn/index.php/tlmt/article/view/37