@article{JMLR:v24:18-080,
  author  = {Benjamin Moseley and Joshua R. Wang},
  title   = {Approximation Bounds for Hierarchical Clustering: Average Linkage, Bisecting K-means, and Local Search},
  journal = {Journal of Machine Learning Research},
  year    = {2023},
  volume  = {24},
  number  = {1},
  pages   = {1--36},
  url     = {http://jmlr.org/papers/v24/18-080.html}
}