@article{Kuczyński:2010,
  author  = "L. Kuczyński and M. Antczak and P. Czechowski and J. Grzybek and L. Jerzak and P. Zabłocki and P. Tryjanowski",
  title   = "A large scale survey of the great grey shrike Lanius excubitor in Poland: breeding densities, habitat use and population trends",
  journal = "Annales Zoologici Fennici",
  volume  = "Vol. 47",
  pages   = "[12]",
  year    = "2010",
}