@article{metriclearningfororderedlabeledtrees,
  title = {Metric Learning for Ordered Labeled Trees with pq-grams},
  author = {Hikaru Shindo and Masaaki Nishino and Yasuaki Kobayashi and Akihiro Yamamoto},
  year = {2020},
  eprint = {2003.03960},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2003.03960v1},
}