1. R.L. Bagley, Frac. Cal. Appl. Anal. 10, 123 (2007)
2. R.B. Bird, J.M. Wiest, Ann. Rev. Fluid Mechan. 27, 169 (1995)
3. D.R. Bland, The Theory of Linear Viscoelasticity (Pergamon, Oxford, 1960)
4. V. Cannelli, D. Melini, A. Piersanti, Ann. Geophys. 53, 89 (2010)
5. M. Caputo, J.R. Astr. Soc. 13, 529 (1967) [Reprinted in Fract. Calc. Appl. Anal. 11, 4 (2008)