Fractional approach, quantum statistics, and non-crystalline solids at very low temperatures E. K. Lenzi, B. F. de Oliveira, N. G.C. Astrath, L. C. Malacarne, R. S. Mendes, M. L. Baesso and L. R. Evangelista Eur. Phys. J. B, 62 2 (2008) 155-158 Published online: 11 April 2008 DOI: 10.1140/epjb/e2008-00144-7