@article{PhysRevLett.91.247901,
  title = {Efficient Immunization Strategies for Computer Networks and Populations},
  author = {Cohen, Reuven and Havlin, Shlomo and ben-Avraham, Daniel},
  journal = {Phys. Rev. Lett.},
  volume = {91},
  issue = {24},
  pages = {247901},
  numpages = {4},
  year = {2003},
  month = {Dec},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.91.247901},
  url = {https://link.aps.org/doi/10.1103/PhysRevLett.91.247901}
}