1. A. H. Sully, “Metallic Creep and Creep Resistant Alloys” (Butterworths Scientific, London, 1949) p. 37.
2. F. K. G. Odqvist and J. Hult, “Kriechfestigkeit Metallischer Werkstoffe”, translated by S. Murakami (Baifukan, Tokyo, 1967) p. 73.
3. F. Garofalo, “Fundamentals of Creep and Creep-Rupture in Metals”, translated by M. Adachi, (Maruzen, Tokyo, 1968) p. 10.
4. V. Lupinc, in “Creep and Fatigue in High Temperature Alloys”, edited by J. Bressers (Applied Science, London, 1981) p. 7.
5. R. W. Evans and B. Wilshire, “Creep of Metals and Alloys” (The Institute of Metals, London, 1985) p. 189.