1. ASM handbook. vol. 17. p. 71–88.
2. Raymond Roark. Formulas for stress and strain. Mc Graw-Hill Book Company.
3. Metals handbook, 9th ed. vol. 1. p. 422–3.
4. Deformation and fracture mechanics of engineering materials;Hertzberg,1989
5. Fracture analysis of forks of a heavy duty lift truck;Figueiredo;Eng Fail Anal,2001