To cite the cold package in publications use:

Goncalves MH, Cabral MS, Ruiz de Villa MC, Escrich E, Solanas M(2007). Likelihood approach for count data in longitudinal experiments. Computational Statistics and Data Analysis, 51(12), 6511-6520

Goncalves MH, Cabral MS(2019). cold: A Package for Count Longitudinal Data, Version 2.0-0. URL: https://CRAN.R-project.org/package=cold

Corresponding BibTeX entries:

  @Article{,
    title = {Likelihood approach for count data in longitudinal
      experiments},
    author = {M. Helena Gon\c{c}alves and M. Salom\'{e} Cabral and M.
      Carme Ruiz {de Villa} and Eduardo Escrich and Montse Solanas},
    year = {2007},
    journal = {Computational Statistics and Data Analysis},
    volume = {51},
    number = {12},
    pages = {6511--6520},
  }
  @Manual{,
    title = {{cold}: A Package for {C}ount {L}ongitudinal {D}ata},
    author = {M. Helena Gon\c{c}alves and M. Salom\'{e} Cabral},
    year = {2019},
    note = {Version 2.0-0},
    url = {https://CRAN.R-project.org/package=cold},
  }