Gradkowski, K. (2008) “Effect of strengthening of the ground subbase of road pavement by geotextiles – experimental investigation”, Roads and Bridges – Drogi i Mosty, 7(4), pp. 5–22. Available at: https://www.rabdim.pl/index.php/rb/article/view/v7n4p5 (Accessed: 6 July 2025).