To cite 'spantest' in publications use:

Ardia D, Seguin B (2025). spantest: Mean-Variance Spanning Tests in R. CRAN.

Corresponding BibTeX entry:

  @Manual{,
    title = {spantest: Mean-Variance Spanning Tests in R},
    author = {David Ardia and Benjamin Seguin},
    year = {2025},
    organization = {CRAN},
  }