To cite package ‘MtreeRing’ in publications use:

  Shi J, Xiang W (2025). _MtreeRing: A Shiny Application for Automatic
  Measurements of Tree-Ring Widths on Digital Images_. R package
  version 1.4.5, <https://github.com/ropensci/mtreering>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {MtreeRing: A Shiny Application for Automatic Measurements of Tree-Ring
Widths on Digital Images},
    author = {Jingning Shi and Wei Xiang},
    year = {2025},
    note = {R package version 1.4.5},
    url = {https://github.com/ropensci/mtreering},
  }