@article{Gulfam:2012,
  author  = "Q. Gulfam and Z. Ficek and J. Evers",
  title   = "Effect of retardation on the dynamics of entanglement between atoms",
  journal = "Physical Review A",
  volume  = "Vol. 86",
  number  = "no. 2",
  pages   = "1--15",
  year    = "2012",
}