@article{Lian:2021aY,
  author = "Lian, L.-L.  and  S.-W. Cui, G. Qin Y. Wang",
  title = "{Observations and numerical simulations of gradual SEP events with Ulysses and ACE}",
  doi = "10.22323/1.395.1351",
  journal = "PoS",
  year = 2021,
  volume = "ICRC2021",
  pages = "1351"
}