To cite package ‘TRES’ in publications use:

  Zeng J, Wang W, Zhang X (2021). “TRES: An R Package for Tensor
  Regression and Envelope Algorithms.” _Journal of Statistical
  Software_, *99*(12), 1-31. doi:10.18637/jss.v099.i12
  <https://doi.org/10.18637/jss.v099.i12>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{TRES}: An {R} Package for Tensor Regression and Envelope Algorithms},
    author = {Jing Zeng and Wenjing Wang and Xin Zhang},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {99},
    number = {12},
    pages = {1--31},
    doi = {10.18637/jss.v099.i12},
  }