Krasiński, Adam. “Field Investigations of Screw Displacement SDP Piles and SDC Columns”. Roads and Bridges - Drogi i Mosty 10, no. 1-2 (April 1, 2011): 21–58. Accessed December 26, 2024. https://rabdim.pl/index.php/rb/article/view/v10n1-2p21.