@article{oai:ismrepo.ism.ac.jp:00033590,
 author = {Nakano, Shin'ya and Fok, Mei-Ching and Brandt, Pontus C son and Higuchi, Tomoyuki},
 issue = {5},
 journal = {Journal of Geophysical Research},
 month = {May},
 pages = {3724--3740},
 title = {Estimation of the helium ion density distribution in the plasmasphere based on a single IMAGE/EUV image},
 volume = {119},
 year = {2014}
}