@article{thetangentsearchengineimprovedsimilarity,
  title = {The Tangent Search Engine: Improved Similarity Metrics and Scalability for Math Formula Search},
  author = {Zanibbi Richard and Davila Kenny and Kane Andrew and Tompa Frank},
  year = {2015},
  eprint = {1507.06235},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1507.06235v1},
}