To cite geepack in publications use:

Fine JP, Yan J, Kosorok MR (2004). “Temporal Process Regression.” Biometrika, 91, 683–703.

Yan J, Fine JP (2004). “Estimating Equations for Association Structures.” Statistics in Medicine, 23, 859–880.

Corresponding BibTeX entries:

  @Article{,
    title = {Temporal Process Regression},
    author = {Jason P. Fine and Jun Yan and Michael R. Kosorok},
    year = {2004},
    journal = {Biometrika},
    volume = {91},
    pages = {683--703},
  }

  @Article{,
    title = {Estimating Equations for Association Structures},
    author = {Jun Yan and Jason P. Fine},
    year = {2004},
    journal = {Statistics in Medicine},
    volume = {23},
    pages = {859--880},
  }