@misc{indiciaec2baa9ee5a26,
  title = {The Calculation of Rotation Factors for Eclipsing Binary Systems.},
  author = {Z Kopal},
  year = {1942},
  doi = {10.1073/pnas.28.4.133},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588531/},
  note = {Source identifier: 16588531}
}