Collective behavior of electronic fireflies M. Ercsey-Ravasz, Zs. Sárközi, Z. Néda, A. Tunyagi and I. Burda Eur. Phys. J. B, 65 2 (2008) 271-277 Published online: 05 September 2008 DOI: 10.1140/epjb/e2008-00336-1