@misc{indiciae59ed632cabba,
  title = {Letter: Models for diffusion gradients in Hydra based on the 'source-sink concept.},
  author = {S Shostak},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4789695/},
  note = {Source identifier: 4789695}
}