Citing articles in R package using roxygen2 and BibTeX?

I'm using roxygen2 as a tool for documenting my R package, and I found that there is a @references tag in roxygen2, but that seems to only accept free form text. I found some presentation about roxygen which has tags @bibliograph and @cite, but am I correct that there is no such thing in roxygen2? Should I then somehow take the references out of the bibtex-file and write them manually with appropriate formatting directly after the @references tag or is there some more clever way of doing this? I have about seven different articles I need to cite, over multiple functions/rd-files.