To cite grangers in publications use:

Farnè M, Montanari A (2022). “A Bootstrap Method to Test Granger-Causality in the Frequency Domain.” Computational Economics, 59, 935–966. doi:10.1007/s10614-021-10112-x.

Corresponding BibTeX entry:

  @Article{,
    title = {A Bootstrap Method to Test Granger-Causality in the
      Frequency Domain},
    author = {Matteo Farnè and Angela Montanari},
    journal = {Computational Economics},
    year = {2022},
    volume = {59},
    pages = {935--966},
    doi = {10.1007/s10614-021-10112-x},
  }