@misc{indiciae9da1e770a948,
  title = {The cosmological evolution of BL Lacertae objects},
  author = {Stocke, John T. and Perlman, Eric S. and Wurtz, Ron and Morris, Simon L.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19930044807},
  note = {Source identifier: 19930044807}
}