@article{BultenaR98,
  title = {Venn Diagrams with Few Vertices},
  author = {Bette Bultena and Frank Ruskey},
  year = {1998},
  url = {http://www.combinatorics.org/Volume_5/Abstracts/v5i1r44.html},
  researchr = {https://researchr.org/publication/BultenaR98},
  cites = {0},
  citedby = {0},
  journal = {Electr. J. Comb.},
  volume = {5},
}