To cite package 'tsfa' in publications use:

Gilbert PD, Meijer E (2005). “Time Series Factor Analaysis with an Application to Measuring Money.” Technical Report 05F10, University of Groningen, SOM Research School. https://hdl.handle.net/11370/d7d4ea3d-af1d-487a-b9b6-c0816994ef5a.

Corresponding BibTeX entry:

  @TechReport{,
    author = {Paul D. Gilbert and Erik Meijer},
    year = {2005},
    title = {Time Series Factor Analaysis with an Application to
      Measuring Money},
    number = {05F10},
    institution = {University of Groningen, SOM Research School},
    url =
      {https://hdl.handle.net/11370/d7d4ea3d-af1d-487a-b9b6-c0816994ef5a},
  }