@misc{indiciaeba36108e9b0b,
  title = {Egg shell colour is affected by laying cage design.},
  author = {A W Walker and B O Hughes},
  year = {1998},
  doi = {10.1080/00071669888593},
  url = {https://pubmed.ncbi.nlm.nih.gov/9925325/},
  note = {Source identifier: 9925325}
}