Kraszewski, Cezary, and Jan Pachowski. “Utilization of Post - Refinery Oil Sludge for Soil Stabilisation in Road Construction. Part II: Trial Sections Tests”. Roads and Bridges – Drogi i Mosty 3, no. 1 (April 1, 2004): 25–54. Accessed May 9, 2025. https://rabdim.pl/index.php/rb/article/view/v3n1p25.