1. Czapliński K. Old Products from Ferroalloys (in Polish). DWE: Wrocław, 2009, 100.
2. Albrecht R. Richtlinien zum Brückenbau. Band 1 - Stählerne Brücken einschließlich Stahlträger in Beton und Verbundkonstrutione. Bauverlag: Wies - baden und Berlin, 1975; 131.
3. EN 10025-2. Hot Rolled Product of Structural Steel – Part 2: Technical Delivery Conditions for Non-alloy Structural Steels, European Committee for Standardization, 2004.
4. Madaj A, Skarżewski JM. Assessment of Properties of Wrought Steel and Early Cast Steels in Bridge Structures (in Polish). Inżynieria i Budownictwo. 1986, nr 2, 71–75.
5. Recommendations for determining the carrying capacity of existing metal structures. UIC code 778-2, UIC, 1986, 50.