Reference:
  Author: Lauris Kaplinski and Maarja Lepamets and Maido Remm
  Title: "GenomeTester4: a toolkit for performing basic set operations - union, intersection and complement on k-mer lists"
  Journal: GigaScience
  Year: 2015
  Volume: 4
  Number: 1
  Pages: 58
  DOI: 10.1186/s13742-015-0097-y
  PMID: 26640690
  URL: https://academic.oup.com/gigascience/article/4/1/1/2707786
  eprint: https://academic.oup.com/gigascience/article-pdf/4/1/1/10894573/13742_2015_Article_97.pdf
