To cite the MSeasy package in publications use:

Nicole, Florence and Guitton, Yann and Courtois, Elodie and Moja, Sandrine and Legendre, Laurent and Hossaert-McKey, Martine: MSeasy: unsupervised and untargeted GC-MS data processing Bioinformatics, (2012)

Some functions (e.g. MS.clust use 3rd party algorithms, see manpages and related packages for respective citations.

Corresponding BibTeX entry:

  @Article{,
    author = {{Nicole} and {Florence} and {Guitton} and {Yann} and
      {Courtois} and {Elodie} and {Moja} and {Sandrine} and {Legendre}
      and {Laurent} and {Hossaert-McKey} and {Martine}},
    title = {MSeasy: unsupervised and untargeted GC-MS data
      processing},
    journal = {Bioinformatics},
    year = {2012},
    doi = {10.1093/bioinformatics/bts427},
  }