[13] J. P. Bouchaud and A. Georges, Phys. Rep. 195 , 127 (1990). 

[14] H. Hinrichsen J. Stat. Mech. Theor. Exp. L06001 (2006). 

[15] F. Baumann and A. Gambassi ( J. Stat. Mech. Theor. Exp.) P01002 (2007). 

[16] J. P. Bouchaud, J. Phys. I(France) 2 , 1705 (1992); 

[17] G. Bel and E. Barkai, Phys. Rev. Lett. 94 , 240602 (2005). 

[18] D. A. Kessler and N. M. Shnerb, J. Phys. A: Math. Theor. 41 , 292003 (2008). 

[19] H. Saleur and D. Sornette, J. Phys. I France 6 , 327 (1996). 

