@misc{indiciae689a9a7e5a12,
  title = {Morphagen gradients. Introduction.},
  author = {L Dale},
  year = {1999},
  doi = {10.1006/scdb.1999.0305},
  url = {https://pubmed.ncbi.nlm.nih.gov/10441542/},
  note = {Source identifier: 10441542}
}