The spqn package is described in:

  Wang Y, Hicks SC, Hansen KD (2020). “Co-expression analysis is biased
  by a mean-correlation relationship.” _bioRxiv_, 2020.02.13.944777.
  doi:10.1101/2020.02.13.944777
  <https://doi.org/10.1101/2020.02.13.944777>.

A BibTeX entry for LaTeX users is

  @Article{spqnPreprint,
    title = {{Co-expression analysis is biased by a mean-correlation relationship}},
    author = {Yi Wang and Stephanie C. Hicks and Kasper D. Hansen},
    year = {2020},
    journal = {bioRxiv},
    pages = {2020.02.13.944777},
    doi = {10.1101/2020.02.13.944777},
  }