@misc{indiciae668805c8d49c,
  title = {Optical Variability of Blazars},
  author = {Ghosh, K. K. and Ramsey, B. D. and Sadun, A. C. and Soundararajaperumal, S.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/19990078570},
  note = {Source identifier: 19990078570}
}