To cite mefa4 in publications use:

S√≥lymos P (2009). “Processing Ecological Data in R with the mefa Package.” Journal of Statistical Software, 29(8), 1–28. doi: 10.18637/jss.v029.i08.

Corresponding BibTeX entry:

  @Article{,
    title = {Processing Ecological Data in {R} with the {mefa}
      Package},
    author = {P\'eter S\'olymos},
    journal = {Journal of Statistical Software},
    year = {2009},
    volume = {29},
    number = {8},
    pages = {1--28},
    doi = {10.18637/jss.v029.i08},
  }