@misc{W2292057472,
  author = {J. K. Gardner and L. Knopoff},
  title = {Is the sequence of earthquakes in Southern California, with aftershocks removed, Poissonian?},
  year = {1974},
  howpublished = {Bulletin of the Seismological Society of America},
  doi = {https://doi.org/10.1785/bssa0640051363}
}