@article{dan-dan zhang2021theme,
  title={Mapping theme trends and knowledge structure of labor analgesia: a quantitative, co-word biclustering analysis of data in 2000-2020},
  author={xue bai,zi-xuan song,yu-xiao wan,zhi-qiang feng,dong-hai yu,dan-dan zhang},
  journal={Signa Vitae},
  volume={17},
  number={4},
  pages={98--107},
  doi = {10.22514/sv.2021.012},
  year={2021}
}