1. 79) T. Ishibashi, “Kinzoku no hirou to hakai no boshi (Prevention of fatigue and fracture of metals)”, Yokendo co. ltd., (1954).
2. 80) “Kekkan to zairyo no hiroukyoudo ni kansuru zadankai”，Journal of The Society of Materials Science, Japan,，6-48 (1957), 613.
3. 81) A. Hobbacher, “Kikai no songai”, 1(1984), 23-29.
4. 82) A. Pineau and B. Tanguy, “Advances in cleavage fracture modeling in steels: Micromechanical, numerical and multiscale aspects”, Academie des Sciences, Vol. 11(2010) 316-325,.
5. 83) Epstein, “Statistical Aspect of Fracture Problems”, Journal of Applied Physics 19 (1948) 140-147.