1. A. T. PRICE and J. A. WILLIAMS: in ‘Recent advances in creep and fracture of engineering materials’, 265; 1982, Swansea, Pineridge Press.
2. Y. N. RABOTNOV: ‘Creep problems in structural members’; 1969, The Netherlands, North Holland Publishing Co.
3. ‘Rules for high temperature high pressure plant’: 1985, The Hague, The Netherlands, Stoomwesen.