To cite package 'traj' in publications use:

Sylvestre M, McCusker J, Cole M, Regeasse A, Belzile E, Abrahamowicz M (2006). “Classification of patterns of delirium severity scores over time in an elderly population.” International psychogeriatrics, 18(04), 667–680. R package version 1.2.

Leffondree K, Abrahamowicz M, Regeasse A, Armelle R, Hawker GA, Badley EM, McCusker J, Belzile E (2004). “Statistical measures were proposed for identifying longitudinal patterns of change in quantitative health indicators.” Journal of clinical epidemiology, 57(10), 1049–1062. R package version 1.2.

Corresponding BibTeX entries:

  @Article{,
    title = {Classification of patterns of delirium severity scores
      over time in an elderly population},
    author = {Marie-Pierre Sylvestre and Jane McCusker and Martin Cole
      and Armelle Regeasse and Eric Belzile and Michal Abrahamowicz},
    journal = {International psychogeriatrics},
    volume = {18},
    number = {04},
    pages = {667--680},
    year = {2006},
    publisher = {Cambridge University Press},
    note = {R package version 1.2},
  }
  @Article{,
    title = {Statistical measures were proposed for identifying
      longitudinal patterns of change in quantitative health
      indicators},
    author = {Karen Leffondree and Michal Abrahamowicz and Armelle
      Regeasse and Regeasse Armelle and Gillian A Hawker and Elizabeth
      M Badley and Jane McCusker and Eric Belzile},
    journal = {Journal of clinical epidemiology},
    volume = {57},
    number = {10},
    pages = {1049--1062},
    year = {2004},
    publisher = {Elsevier},
    note = {R package version 1.2},
  }