To cite package ‘isnullptr’ in publications use:

Förster J (2024). isnullptr: Check if an 'externalptr' is a Null Pointer. R package version 1.0.2, https://github.com/jonasfoe/isnullptr.

Corresponding BibTeX entry:

  @Manual{,
    title = {isnullptr: Check if an 'externalptr' is a Null Pointer},
    author = {Jonas Förster},
    year = {2024},
    note = {R package version 1.0.2},
    url = {https://github.com/jonasfoe/isnullptr},
  }