@misc{indiciae4844218b0272,
  title = {Many ways to make a gradient.},
  author = {J C Smith and J B Gurdon},
  year = {2004},
  doi = {10.1002/bies.20076},
  url = {https://pubmed.ncbi.nlm.nih.gov/15221850/},
  note = {Source identifier: 15221850}
}