To cite glarma in publications use:

Dunsmuir WTM, Scott DJ (2015). “The glarma Package for Observation-Driven Time Series Regression of Counts.” Journal of Statistical Software, 67(7), 1–36. doi:10.18637/jss.v067.i07.

Corresponding BibTeX entry:

  @Article{,
    title = {The {glarma} Package for Observation-Driven Time Series
      Regression of Counts},
    author = {William T. M. Dunsmuir and David J. Scott},
    journal = {Journal of Statistical Software},
    year = {2015},
    volume = {67},
    number = {7},
    pages = {1--36},
    doi = {10.18637/jss.v067.i07},
  }