@article{technicalprogressanalysisusingadynamic,
  title = {Technical Progress Analysis Using a Dynamic Topic Model for Technical Terms to Revise Patent Classification Codes},
  author = {Mana Iwata and Yoshiro Matsuda and Yoshimasa Utsumi and Yoshitoshi Tanaka and Kazuhide Nakata},
  year = {2020},
  eprint = {2012.10120},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2012.10120v1},
}