To cite package 'l2boost' in publications use:

John Ehrlinger, Hemant Ishwaran,and the R Development Core Team (2013). l2boost: Boosting linear regression models with l2 loss. R package version 1.0.

Corresponding BibTeX entry:

  @Manual{,
    title = {l2boost: Boosting linear regression models with l2 loss},
    author = {John Ehrlinger and Hemant Ishwaran and {R Development
      Core Team}},
    year = {2013},
    note = {R package version 1.0},
  }