@misc{indiciaec1fbee395dda,
  title = {Quantitative evidence for the two-gradient hypothesis in the primary induction.},
  author = {S TOIVONEN and L SAXEN and T VAINIO},
  year = {1961},
  doi = {10.1007/bf02171440},
  url = {https://pubmed.ncbi.nlm.nih.gov/13777212/},
  note = {Source identifier: 13777212}
}