To cite package ‘TreeRingShape’ in publications use:

ISHIDA M (2025). TreeRingShape: Recording Tree-Ring Shapes of Tree Disks with Manual Digitizing and Interpolating Model. R package version 3.0.5, https://github.com/ishidamgm/treeringshape.

Corresponding BibTeX entry:

  @Manual{,
    title = {TreeRingShape: Recording Tree-Ring Shapes of Tree Disks
      with Manual Digitizing and Interpolating Model},
    author = {Megumi ISHIDA},
    year = {2025},
    note = {R package version 3.0.5},
    url = {https://github.com/ishidamgm/treeringshape},
  }