@misc{indiciae80c23c6cb3ec,
  title = {Developing indicators for European birds.},
  author = {Richard D Gregory and Arco van Strien and Petr Vorisek and Adriaan W Gmelig Meyling and David G Noble and Ruud P B Foppen and David W Gibbons},
  year = {2005},
  doi = {10.1098/rstb.2004.1602},
  url = {https://pubmed.ncbi.nlm.nih.gov/15814345/},
  note = {Source identifier: 15814345}
}