@misc{indiciaef83007aeedd6,
  title = {Morphological differences in Xenopus embryonic mesodermal cells are specified as an early response to distinct threshold concentrations of activin.},
  author = {K Symes and C Yordán and M Mercola},
  year = {1994},
  doi = {10.1242/dev.120.8.2339},
  url = {https://pubmed.ncbi.nlm.nih.gov/7925034/},
  note = {Source identifier: 7925034}
}