@techreport{Zehtindjiev-2019-153931,
  author = {Zehtindjiev, P and Whitfield, D},
  title = {Monitoring of spring bird migration in the Integrated System for Protection of Birds},
  institution = {Bulgarian Academy of Sciences},
  year = {2019},
  month = {aug},
  url = {https://img1.wsimg.com/blobby/go/1a109f6d-5fe3-4ff5-bcf3-17602b59ac27/downloads/2018%20Report_Spring%20Bird%20Migration_ENG.pdf?ver=1583329610997},
  keywords = {Wind Energy, Land-Based Wind, Collision, Displacement, Birds},
}