@article{Beckmann:2005,
  author  = "V. Beckmann and C. Shrader and N. Gehrels and S. Soldi and P. Lubiński and A. Zdziarski and P. Petrucci and J. Malzac",
  title   = "The high-energy spectrum of NGC 4151",
  journal = "Astrophysical Journal",
  volume  = "Vol. 634",
  pages   = "939--946",
  year    = "2005",
}