Bilinear effect in complex systems Lui Lam, David C. Bellavia, Xiao-Pu Han, Chih-Hui Alston Liu, Chang-Qing Shu, Zhengjin Wei, Tao Zhou and Jichen Zhu EPL, 91 6 (2010) 68004 Published online: 14 October 2010 DOI: 10.1209/0295-5075/91/68004