@article{hierarchicalknowledgegraphsanovel,
  title = {Hierarchical Knowledge Graphs: A Novel Information Representation for Exploratory Search Tasks},
  author = {Bahareh Sarrafzadeh and Adam Roegiest and Edward Lank},
  year = {2020},
  eprint = {2005.01716},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2005.01716v1},
}