@misc{indiciae670d41b89afb,
  title = {Rigidity spectrum of Forbush decrease},
  author = {Sakakibara, S. and Munakata, K. and Nagashima, K.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850026747},
  note = {Source identifier: 19850026747}
}