The reference for the 'filehash' package is:
Peng RD (2006). “Interacting with data using the filehash package,” R News, 6 (4), 19--24.
Corresponding BibTeX entry:
@Article{, title = {Interacting with data using the filehash package}, author = {Roger D. Peng}, journal = {R News}, year = {2006}, volume = {6}, number = {4}, pages = {19--24}, url = {https://cran.r-project.org/doc/Rnews/}, }