1. TIMO, D. P., Int. Conf. on Thermal Stresses and Fatigue, 22 to 26, Sept. 1969, Proceedings, 453.
2. EDLER, W. I. E. et al., ASTM STP 520, 320.
3. SAUTTER, S., Techn. -wiss. Ber. MPA Stuttgart 1971, Heft 71–04.
4. IDLER, R., Techn. -wiss. Ber. MPA Stuttgart 1975, Heft 75–04.