bibentry(bibtype = "Article",
  title        = "Panel Data Econometrics in {R}: The {plm} Package",
  author       = c(person(given = "Yves",
                          family = "Croissant",
                          email = "yves.croissant@univ-reunion.fr"),
                   person(given = "Giovanni",
                          family = "Millo",
                          email = "Giovanni.Millo@Generali.com")),
  journal      = "Journal of Statistical Software",
  year         = "2008",
  volume       = "27",
  number       = "2",
  pages        = "1--43",
  doi          = "10.18637/jss.v027.i02",

  header       = "To cite plm in publications use:"
)

bibentry(bibtype = "Article",
  title        = "Robust Standard Error Estimators for Panel Models: A Unifying Approach",
  author       = person(given = "Giovanni",
                        family = "Millo",
                        email = "Giovanni.Millo@Generali.com"),
  journal      = "Journal of Statistical Software",
  year         = "2017",
  volume       = "82",
  number       = "3",
  pages        = "1--27",
  doi          = "10.18637/jss.v082.i03",

  header       = "For the covariance matrix estimators in plm, please cite:"
)
