E. J. Barbero. "Time-temperature-age Superposition Principle for Predicting Long-term Response of Linear Viscoelastic Materials", chapter 2 in Creep and fatigue in polymer matrix composites. Woodhead, 2011.
Oldroyd, James (February 1950). "On the Formulation of Rheological Equations of State". Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. 200 (1063): 523–541. Bibcode:1950RSPSA.200..523O. doi:10.1098/rspa.1950.0035. S2CID123239889.
Oldroyd, James (February 1950). "On the Formulation of Rheological Equations of State". Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. 200 (1063): 523–541. Bibcode:1950RSPSA.200..523O. doi:10.1098/rspa.1950.0035. S2CID123239889.
Oldroyd, James (February 1950). "On the Formulation of Rheological Equations of State". Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. 200 (1063): 523–541. Bibcode:1950RSPSA.200..523O. doi:10.1098/rspa.1950.0035. S2CID123239889.