@misc{indiciaeca1a9c85770f,
  title = {Is there a surplus?},
  author = {A Porter},
  year = {1986},
  doi = {10.1136/vr.118.15.434-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/3705402/},
  note = {Source identifier: 3705402}
}