@misc{indiciaef86b5343562f,
  title = {The JPL Proton Fluence Model: An Update},
  author = {Feynman, J. and Ruzmaikin, A. and Berdichevsky, V.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20060041045},
  note = {Source identifier: 20060041045}
}