To cite BeSS in publications use:

  Wen C, Zhang A, Quan S, Wang X (2020). “BeSS: An R Package for Best
  Subset Selection in Linear, Logistic and Cox Proportional Hazards
  Models.” _Journal of Statistical Software_, *94*(4), 1-24.
  doi:10.18637/jss.v094.i04 <https://doi.org/10.18637/jss.v094.i04>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{BeSS}: An {R} Package for Best Subset Selection in Linear, Logistic and {C}ox Proportional Hazards Models},
    author = {Canhong Wen and Aijun Zhang and Shijie Quan and Xueqin Wang},
    journal = {Journal of Statistical Software},
    year = {2020},
    volume = {94},
    number = {4},
    pages = {1--24},
    doi = {10.18637/jss.v094.i04},
  }