To cite nparACT in publications use:

Blume C, Santhi N, Schabus M (2016). “‘nparACT’ package for R: A free software tool for the non-parametric analysis of actigraphy data.” MethodsX. doi:10.1016/j.mex.2016.05.006, https://www.sciencedirect.com/science/article/pii/S221501611630022X?via%3Dihub.

Corresponding BibTeX entry:

  @Article{,
    title = {‘nparACT’ package for R: A free software tool for the
      non-parametric analysis of actigraphy data},
    author = {Christine Blume and Nayantara Santhi and Manuel Schabus},
    journal = {MethodsX},
    year = {2016},
    doi = {10.1016/j.mex.2016.05.006},
    url =
      {https://www.sciencedirect.com/science/article/pii/S221501611630022X?via%3Dihub},
  }