Barrett, R., Farragher, T., Hyde, C. J., O'Dowd, N., O'Donoghue, P., & Leen, S. (2014). A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel. Journal of Pressure Vessel Technology, 136(2), Article 021402. https://doi.org/10.1115/1.4025618