@techreport{Ahlen-2003-3475,
  author = {Ahlén, I},
  title = {Wind Turbines and Bats - A Pilot Study},
  institution = {Swedish Energy Agency},
  year = {2003},
  month = {dec},
  keywords = {Wind Energy, Land-Based Wind, Collision, Attraction, Passerines, Birds, Bats},
}