To cite cold in publications use:

Gonçalves MH, Cabral MS (2021). “cold: An R Package for the Analysis of Count Longitudinal Data.” Journal of Statistical Software, 99(3), 1–34. doi:10.18637/jss.v099.i03.

Gonçalves MH, Cabral MS, de Villa MCR, Escrich E, Solanas M (2007). “Likelihood approach for count data in longitudinal experiments.” Computational Statistics and Data Analysis, 51(12), 6511–6520.

Corresponding BibTeX entries:

  @Article{,
    title = {{cold}: An {R} Package for the Analysis of Count
      Longitudinal Data},
    author = {M. Helena Gon\c{c}alves and M. Salom\'{e} Cabral},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {99},
    number = {3},
    pages = {1--34},
    doi = {10.18637/jss.v099.i03},
  }

  @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},
  }