To cite Summix in publications use:

  Hayley R Stoneman, Adelle Price, Nikole Scribner Trout, Riley Lamont,
  Souha Tifour, Nikita Pozdeyev, Kristy Crooks, Meng Lin, Nicholas
  Rafaels, Katie M Marker, Christopher R Gignoux, Audrey E Henrdicks
  (2024). Characterizing substructure via mixture modeling of genetic
  similarity in large-scale summary statistics bioRxiv
  2024.01.29.577805. doi: https://doi.org/10.1101/2024.01.29.577805.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Characterizing substructure via mixture modeling of genetic similarity in large-scale summary statistics},
    author = {Hayley R Stoneman and Adelle Price and Nikole Scribner Trout and Riley Lamont and Souha Tifour and Nikita Pozdeyev and Kristy Crooks and Meng Lin and Nicholas Rafaels and Katie M Marker and Christopher R Gignoux and Audrey E Hendricks},
    journal = {bioRxiv},
    year = {2024},
    url = {https://doi.org/10.1101/2024.01.29.577805},
  }