@misc{indiciaeaa99149bdb13,
  title = {The small radio source at the galactic center},
  author = {Kellermann, K. I. and Shaffer, D. B. and Clark, B. G. and Geldzahler, B. J.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770051176},
  note = {Source identifier: 19770051176}
}