To cite networktree in publications use:

Jones PJ, Mair P, Simon T, Zeileis A (2020). “Network Trees: A Method for Recursively Partitioning Covariance Structures.” Psychometrika, 85(4), 926–945. doi: 10.1007/s11336-020-09731-4.

Corresponding BibTeX entry:

  @Article{,
    title = {Network Trees: A Method for Recursively Partitioning
      Covariance Structures},
    author = {Payton J. Jones and Patrick Mair and Thorsten Simon and
      Achim Zeileis},
    journal = {Psychometrika},
    year = {2020},
    volume = {85},
    number = {4},
    pages = {926--945},
    doi = {10.1007/s11336-020-09731-4},
  }