To cite the geeM package in publications use:

McDaniel, L. S., Henderson, N. C., and Rathouz, P. J. (2013) Fast pure R implementation of GEE: application of the Matrix package The R Journal, 5/1:181--187

Corresponding BibTeX entry:

    author = {Lee S. McDaniel and Nicholas C. Henderson and Paul J.
    title = {Fast pure {R} implementation of {GEE}: application of the
      {M}atrix package},
    journal = {The {R} Journal},
    year = {2013},
    volume = {5},
    issue = {1},
    pages = {181--187},
    url =