@article{1541,
  author = {Haojin Zhu and Xiaodong Lin and Minghui Shi and Pin-Han Ho and Xuemin Shen},
  title = {PPAB: A privacy-preserving authentication and billing architecture for metropolitan area sharing networks},
  year = {2009},
  journal = {IEEE Transactions on Vehicular Technology},
  volume = {58},
  number = {5},
  pages = {2529-2543},
  publisher = {IEEE},
}