To cite kolmim in publications use:

Luis Carvalho (2015). An Improved Evaluation of Kolmogorov's Distribution. Journal of Statistical Software, 65(3), 1-7. URL http://www.jstatsoft.org/v65/c03/.

Corresponding BibTeX entry:

  @Article{,
    title = {An Improved Evaluation of Kolmogorov's Distribution},
    author = {Luis Carvalho},
    journal = {Journal of Statistical Software},
    year = {2015},
    volume = {65},
    number = {3},
    pages = {1--7},
    url = {http://www.jstatsoft.org/v65/c03/},
  }