@article{ Yao13-CCPE,
  author = {L. Yao and L. Kang and F. Deng and J. Deng and G. Wu},
  title = {Protecting Source-Location Privacy Based on Multi-Rings in
  Wireless Sensor Networks},
  journal = {Wiley's Concurrency and Computation: Practice and 
Experiecne , Special Issue on Trust and Security in Wireless Sensor
Networks},
  volume = {},
  number = {},
  pages = {},
  month = {},
  year = {2013}, 
  note = {to appear} }