Czagowiec, Zbigniew, Michał A. Glinicki, and Piotr Kowalski. “Evaluation of Technical Condition of Concrete Covers of Cable Manhole Used in Roads”. Roads and Bridges – Drogi i Mosty 8, no. 3 (February 8, 2016): 5–30. Accessed May 2, 2025. https://www.rabdim.pl/index.php/rb/article/view/296.