@article{ding_gu_tang_xiong_guo_xu_geng_ge_chen_2022, 
  title={The variability and soft X-ray excess properties of narrow-line Seyfert 1 galaxies: The Swift view}, 
  DOI={10.1051/0004-6361/202142650}, 
  publisher={EDP Sciences}, 
  author={Ding, N. and Gu, Q. S. and Tang, Y. Y. and Xiong, D. R. and Guo, X. T. and Xu, X. P. and Geng, X. F. and Ge, X. and Chen, Y. Y.}, 
  year={2022}, 
  month={Jan}
  }