The study of the maximum recoverable work is given in terms of Fourier-transformed quantities for incompressible viscoelastic fluids. This maximum is related to the minimum free energy of the system, whose expression is found as a function of the minimal state. Finally, these results are developed for a discrete spectrum model.
"Maximum recoverable work for incompressible viscoelastic fluids and application to a discrete spectrum model." Differential Integral Equations 20 (4) 445 - 466, 2007.