1. J. Okrajni, A. Marek, and G. Junak, Description of the Deformation Process Under Thermo-mechanical Fatigue, J. Achiev. Mater. Manuf. Eng., 2007, 21(2), p 15–23
2. A. Neimitz, I. Dzioba, M. Graba, and J. Okrajni, Ocena wytrzymałości, trwałości i bezpieczeństwa pracy elementów konstrukcyjnych zawierających defekty (The Assessment of the Strength and Safety of the Operation High Temperature Components Containing Crack), Kielce University of Technology Publishing, Kielce, 2008 (in Polish)
3. D. Renowicz and M. Cieśla, Crack Initiation in Steels Parts Working in Boilers and Steam Pipelines, J. Achiev. Mater. Manuf. Eng., 2007, 21(2), p 49–52
4. European Standard PN-EN 12952-3:2004, Water-Tube Boilers and Auxiliary Installation, Part 3: Design and Calculation for Pressure Parts
5. European Standard PN-EN 12952-4, Water-Tube Boilers and Auxiliary Installation, Part 4: In-Service Boiler Life Expectancy Calculations