@article{QiuWegenerWirgesetal.2005,
  author    = {X. L. Qiu and Michael Wegener and Werner Wirges and X. Q. Zhang and J. Hillenbrand and Zhongfu Xia and Reimund Gerhard and G. M. Sessler},
  title     = {Penetration of sulfur hexafluoride into cellular polypropylene films and its effect on the electric charging and electromechanical response of ferroelectrets},
  year      = {2005},
}