The purpose of this short paper dedicated to Prof Constantin Tsallis on his 60th anniversary is to show how the use of mathematical tools and physical concepts introduced by Burr, Lévy and Tsallis open a new line of analysis of the old problem of non-Debye decay and universality of relaxation....

We have derived a general two-power-law relaxation function for heterogeneous materials using the maximum entropy principle for nonextensive systems. The power law exponents of the relaxation function are simply related to a global fractal parameter α and for large time to the entropy...