1. M.G. Collins, An investigation of ductility dip cracking in nickel-base filler materials, Master thesis, The Ohio State University, Columbus, OH, USA, 2002, p. 240.
2. A.H. Cottrell, Intercrystalline creep fractures, in: Structural Process in Creep, The Iron Steel Institute, London, 1961, pp. 1–18.