@misc{indiciaef60e74549ab6,
  title = {Some Recent Developments in the Endochronic Theory with Application to Cyclic Histories},
  author = {Valanis, K. C. and Lee, C. F.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19830026093},
  note = {Source identifier: 19830026093}
}