Daae, M., Shprits, Y., Ni, B., Koller, J., Kondrashov, D., Chen, Y. (2011): Reanalysis of radiation belt electron phase space density using various boundary conditions and loss models. - Advances in Space Research, 48, 8, 1327-1334.https://doi.org/10.1016/j.asr.2011.07.001