Random networks of fibres display maximal heterogeneity in the distribution of elastic energy J. A. Åström, J. Timonen, M. Myllys, J. Fellman and J. LeBell Eur. Phys. J. E, 22 1 (2007) 61-66 Published online: 21 February 2007 DOI: 10.1140/epje/e2007-00005-2