@misc{indiciae7e4b1bed939e,
  title = {When does causality constrain the monopole abundance?},
  author = {TW Kibble and EJ Weinberg},
  year = {1991},
  doi = {10.1103/physrevd.43.3188},
  url = {https://pubmed.ncbi.nlm.nih.gov/10013274/},
  note = {Source identifier: 10013274}
}