@article{Loper:2019PE,
  author = "Loper, Robert  and  Round, Joseph  and  Nava, Omar  and  Kahler, Stephen W.",
  title = "{Variations of Heavy Ion Abundances Relative to Proton Abundances in Large Solar Energetic (E > 10 MeV) Particle Events.}",
  doi = "10.22323/1.358.1090",
  journal = "PoS",
  year = 2019,
  volume = "ICRC2019",
  pages = "1090"
}