Bęben, Damian, and Zbigniew Mańko. “Experimental Research on Steel Shell of Road Bridge During Backfilling”. Roads and Bridges – Drogi i Mosty 3, no. 2 (April 1, 2004): 15–39. Accessed May 2, 2025. https://www.rabdim.pl/index.php/rb/article/view/v3n2p15.