N. Arkani-Hamed, A. Cohen, und H. Georgi. (2001)cite arxiv:hep-ph/0105239Comment: 11 pages. Additional references and further clarifying remarks to agree with version to appear in PLB.
J. Magee, R. Curtis, L. Lue, und V. Vasquez. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)