@article{Aasi:2012,
  author  = "J. Aasi and J. Abadie and B. Abbott and R. Abbott and T. Abbott and M. Abernathy and T. Accadia and F. Acernese and C. Adams and -. [et. al.] and D. Rosińska and -. [et. al.]",
  title   = "The characterization of Virgo data and its impact on gravitational-wave searches",
  journal = "Classical and Quantum Gravity",
  volume  = "Vol. 29",
  number  = "no 15",
  pages   = "155002",
  year    = "2012",
}