D. Bak. (2006)cite arxiv:hep-th/0603080
Comment: 18 pages, 5 figures, references added, minor corrections, further
minor corrections, v4: some clarification and more details added.
D. Lohse, R. Bergmann, D. Meer, und G. Caballero. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)