Investigation of percolation theory and permittivity model with one-dimensional fillers Jianhua Wang, Junli Wang, Shengli Qi, Yiyi Sun, Guofeng Tian and Dezhen Wu EPL, 117 1 (2017) 17001 Published online: 20 February 2017 DOI: 10.1209/0295-5075/117/17001