To cite the mixsqp package, please use:

  Youngseok Kim, Peter Carbonetto, Matthew Stephens and Mihai Anitescu
  (2020). A fast algorithm for maximum likelihood estimation of mixture
  proportions using sequential quadratic programming. Journal of
  Computational and Graphical Statistics 29(2), 261-273,
  doi:10.1080/10618600.2019.1689985

A BibTeX entry for LaTeX users is

  @Article{,
    title = {A fast algorithm for maximum likelihood estimation of mixture proportions using sequential quadratic programming},
    author = {{Youngseok Kim} and {Peter Carbonetto} and {Matthew Stephens} and {Mihai Anitescu}},
    journal = {Journal of Computational and Graphical Statistics},
    volume = {29},
    number = {2},
    pages = {261--273},
    year = {2020},
    url = {https://doi.org/10.1080/10618600.2019.1689985},
  }