R help - Jul 2004 - recommended citation

Dear Sirs,

I used the nlme package for the statistical analysis of my data for 
prepared MS. Please, can you write me what is your recommended form of 
citation of this program?
Thanks in advance for your reply.

Sincerely,

Lumir Gvozdik

> Dear Sirs,
>
> I used the nlme package for the statistical analysis of my data for
> prepared MS. Please, can you write me what is your recommended form of
> citation of this program?
> Thanks in advance for your reply.
>
I "cheat" and cite the book that supports it:

@Book{Pinheiro:2000:MMS,
  author =       "Jose C. Pinheiro and Douglas M. Bates",
  title =        "Mixed-effects models in {S} and {S-PLUS}",
  publisher =    Springer Verlag,
  address =      New York,
  year =         "2000",
}