@misc{indiciae9977bd422e8a,
  title = {Echo mapping of active galactic nuclei broad-line regions: Fundamental algorithms},
  author = {Vio, Roberto and Horne, Keith and Wamsteker, Willem},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/19950050111},
  note = {Source identifier: 19950050111}
}