@misc{indiciaebbde3ceebd3a,
  title = {Positional signalling: where are we now?},
  author = {J Smith},
  year = {1989},
  doi = {10.1016/0168-9525(89)90066-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/2672457/},
  note = {Source identifier: 2672457}
}