@misc{indiciae87f5b66ba74c,
  title = {Prolonged gestation in mare.},
  author = {M C Collins and A Johnston},
  year = {1987},
  doi = {10.1136/vr.121.8.183},
  url = {https://pubmed.ncbi.nlm.nih.gov/3660563/},
  note = {Source identifier: 3660563}
}