To cite package ‘simex’ in publications use:

Lederer W, Seibold H (2019). simex: SIMEX- And MCSIMEX-Algorithm for Measurement Error Models. R package version 1.8, https://github.com/wolfganglederer/simex.

Corresponding BibTeX entry:

  @Manual{,
    title = {simex: SIMEX- And MCSIMEX-Algorithm for Measurement Error
      Models},
    author = {Wolfgang Lederer and Heidi Seibold},
    year = {2019},
    note = {R package version 1.8},
    url = {https://github.com/wolfganglederer/simex},
  }