To cite the synlik package in publications use:

Matteo Fasiolo, Simon N. Wood. An introduction to esaddle (2014). R package version 0.0.2.

Corresponding BibTeX entry:

  @Manual{,
    title = {An introduction to esaddle (2016). R package version
      0.0.2.},
    author = {Matteo Fasiolo and Simon N. Wood},
    year = {2016},
  }