@article{1813,
  author = {Rick Ha and Pin-Han Ho and Sherman Shen and Junshan Zhang},
  title = {Sleep scheduling for wireless sensor networks via network flow model},
  year = {2006},
  journal = {Computer Communications},
  volume = {29},
  number = {13-14},
  pages = {2469-2481},
  publisher = {Elsevier},
}