To cite package ‘DDRTree2’ in publications use:

  Qiu X, Trapnell C, Mao Q, Wang L (2025). _DDRTree2: Learning
  Principal Graphs with DDRTree (Performance-Optimized Fork)_. R
  package version 0.2.0, <https://github.com/billsfriend/ddrtree2>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {DDRTree2: Learning Principal Graphs with DDRTree (Performance-Optimized
Fork)},
    author = {Xiaojie Qiu and Cole Trapnell and Qi Mao and Li Wang},
    year = {2025},
    note = {R package version 0.2.0},
    url = {https://github.com/billsfriend/ddrtree2},
  }