To cite treethresh in publications use:

Ludger Evers, Tim Heaton (2017). Locally Adaptive Tree-Based Thresholding Using the treethresh Package in R. Journal of Statistical Software, Code Snippets, 78(2), 1-22.<doi:10.18637/jss.v078.c02>

Corresponding BibTeX entry:

  @Article{,
    title = {Locally Adaptive Tree-Based Thresholding Using the
      {treethresh} Package in {R}},
    author = {Ludger Evers and Tim Heaton},
    journal = {Journal of Statistical Software, Code Snippets},
    year = {2017},
    volume = {78},
    number = {2},
    pages = {1--22},
    doi = {10.18637/jss.v078.c02},
  }