Skuodis, Šarūna, Arnoldas Norkus, Neringa Dirgėlienė, and Liudvikas Rimkus. “Determining Characteristic Sand Shear Parameters of Strength via a Direct Shear Test”. Journal of Civil Engineering and Management 22, no. 2 (March 1, 2016): 271-278. Accessed May 18, 2021. https://journals.vgtu.lt/index.php/JCEM/article/view/1293.