@misc{peng2018comparative,
  title={Comparative study of gamma-ray emission from molecular clouds and star-forming galaxies},
  author={Fang-Kun Peng and Shao-Qiang Xi and Xiang-Yu Wang and Qi-Jun Zhi and Di Li},
  year={2018},
  eprint={1811.07117},
  archivePrefix={arXiv},
  primaryClass={astro-ph.HE},
  doi={10.1051/0004-6361/201833859},
  url={https://arxiv.org/abs/1811.07117}
}