To cite inspector in publications use:

Fonseca P (2021). inspector: Validation of Arguments and Objects in User-Defined Functions. R package version 1.0.3, https://ptfonseca.github.io/inspector/.

Corresponding BibTeX entry:

  @Manual{,
    title = {inspector: Validation of Arguments and Objects in
      User-Defined Functions},
    author = {Pedro Fonseca},
    year = {2021},
    note = {R package version 1.0.3},
    url = {https://ptfonseca.github.io/inspector/},
  }