1. “Zur Theorie der elastischen Nachwirkung”;BOLTZMANN;Pogg. Ann. Physik,1876
2. “Combined Stress Creep Experiments on a Nonlinear Viscoelastic Material to Determine the Kernel Functions for a Multiple Integral Representation of Creep”;ONARAN;Trans. Soc. of Rheology,1965
3. The Creep of Steel at High Temperature;NORTON,1929
4. Creep of Metals;TAPSELL,1931