@misc{dobashi2019cloud,
  title={Cloud-cloud collision in the DR 21 cloud as a trigger of massive star formation},
  author={Kazuhito Dobashi and Tomomi Shimoikura and Shou Katakura and Fumitaka Nakamura and Yoshito Shimajiri},
  year={2019},
  eprint={1905.07467},
  archivePrefix={arXiv},
  primaryClass={astro-ph.GA},
  doi={10.1093/pasj/psz041},
  url={https://arxiv.org/abs/1905.07467}
}