@misc{indiciae51ab057d32c1,
  title = {Fluctuating nodal rhythm.},
  author = {I L VURAL and S R ELEK},
  year = {1961},
  doi = {10.1378/chest.40.6.691},
  url = {https://pubmed.ncbi.nlm.nih.gov/13926969/},
  note = {Source identifier: 13926969}
}