To cite package 'phmm' in publications use:

Michael C Donohue and Ronghui Xu,(2012). phmm: Proportional Hazards Mixed-effects Models. R package version 0.7-4.

Vaida F and Xu R. (2000). Proportional hazards model with random effects. Statistics in Medicine, 19:3309-3324.

Donohue, MC, Overholser, R, Xu, R, and Vaida, F. (January 01, 2011). Conditional Akaike information under generalized linear and proportional hazards mixed models. Biometrika, 98, 3, 685-700.

Corresponding BibTeX entries:

  @Manual{,
    title = {phmm: Proportional Hazards Mixed-effects Models},
    author = {Michael C Donohue and Ronghui Xu},
    year = {2012},
    note = {R package version 0.7-4},
  }

  @Article{,
    title = {Proportional hazards model with random effects},
    author = {Florin Vaida and Ronghui Xu},
    journal = {Statistics in Medicine},
    year = {2000},
    number = {19},
    pages = {3309-3324},
  }

  @Article{,
    title = {Conditional Akaike information under generalized linear
      and proportional hazards mixed models},
    author = {Michael C Donohue and Rosanna Overholser and Ronghui Xu
      and Vaoda Florin},
    journal = {Biometrika},
    year = {2011},
    number = {98, 3},
    pages = {685-700},
  }