@misc{indiciaec2f1b014615a,
  title = {Ontogenetic changes in pacemaker activity in chick heart.},
  author = {K Löffelholz and A J Pappano},
  year = {1974},
  doi = {10.1016/0024-3205(74)90277-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4407740/},
  note = {Source identifier: 4407740}
}