1. Caddie, R.M., Deformation and Fracture of Solids, Prentice-Hall Inc., Englewood, Cliffs, N.J., 1980.
2. Egan, G.R., Comatability of Linear Elastic kic and General Tielding COD Fracture Mechanics. Engineering Fracture Mechanics, 5, 1973, pp 167–185.
3. Ayoub, M.T., On The Relationship of Charpy Impact Results of Low Alloy Steel and its Fractrure Toughness. Proceeding of the International 85 AMSE Conference Modelling and Simulation, Athens, Greece, June 1984.