@article{efficientandrobustapproximatenearest,
  title = {Efficient and robust approximate nearest neighbor search using Hierarchical Navigable Small World graphs},
  author = {Yu. A. Malkov and D. A. Yashunin},
  year = {2016},
  eprint = {1603.09320},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1603.09320v4},
}