To cite `variosig` in publication use:

Wang C, Furrer R (2018). “Monte Carlo Permutation Tests for Assessing Spatial Dependence at Difference Scales.” Nonparametric Statistics.

Corresponding BibTeX entry:

  @Article{,
    title = {Monte Carlo Permutation Tests for Assessing Spatial
      Dependence at Difference Scales},
    author = {Craig Wang and Reinhard Furrer},
    journal = {Nonparametric Statistics},
    year = {2018},
  }