Multiscaling and non-universality in fluctuations of driven complex systems Z. Eisler, J. Kertész, S.-H. Yook and A.-L. Barabási Europhys. Lett., 69 4 (2005) 664-670 Published online: 19 January 2005 DOI: 10.1209/epl/i2004-10384-1