To cite `variosig` in publication use:

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

A BibTeX entry for LaTeX users is

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