1. ASME Boiler and Pressure Vessel Code, Case Interpretations, Code Case N-47. American Society of Mechanical Engineers, New York (1974).
2. ?Creep Analysis,? Wiley-Interscience publication, New York (1980).
3. Section 12 of ?Creep and Fracture of Engineering Materials and Structures, Pt. II,? and eds., Pineridge Press, Swansea, UK (1984).
4. Journal AWWA, 443 (July 1972).
5. Factors affecting fatigue resistance in rigid UPVC pipe compositions