To cite package ‘ZEP’ in publications use:

Romaniuk M, Parchami A, Grzegorzewski P (2025). ZEP: Procedures Related to the Zadeh's Extension Principle for Fuzzy Data. R package version 0.3.1, https://github.com/mroman-ibs/zep.

Corresponding BibTeX entry:

  @Manual{,
    title = {ZEP: Procedures Related to the Zadeh's Extension Principle
      for Fuzzy Data},
    author = {Maciej Romaniuk and Abbas Parchami and Przemyslaw
      Grzegorzewski},
    year = {2025},
    note = {R package version 0.3.1},
    url = {https://github.com/mroman-ibs/zep},
  }