To cite package 'seroincidence' in publications use:

Peter Teunis (2015). Estimating Infection Rates from Serological Data. R package version 1.0.5.

Corresponding BibTeX entry:

  @Manual{,
    title = {seroincidence: Estimating Infection Rates from Serological
      Data},
    author = {Peter Teunis},
    year = {2015},
    note = {R package version 1.0.5},
    url =
      {http://ecdc.europa.eu/en/data-tools/seroincidence-calculator-tool/Pages/default.aspx},
  }