1. J. Sabatier, O.P. Agrawal, J.A.T. Machado (eds.), Advances in Fractional Calculus: Theoretical Developments and Applications in Physics and Engineering (Springer, Dordrecht, The Netherlands, 2007)
2. D. Baleanu, J.A.T. Machado, Phys. Scr. T136, 014001 (2009)
3. D. Baleanu, Z.B. Güvenc, J.A.T. Machado (eds.), New Trends in Nanotechnology and Fractional Calculus Applications (Springer, Dordrecht, 2010)
4. D. del-Castello-Negrete, B.A. Carreras, V.E. Lynch, Phys. Rev. Lett. 94, 065003 (2005)
5. G. Whitham, Linear and Nonlinear Waves (Wiley, New York, 1974)