Prediction of relativistic electron flux at geostationary orbit following storms: Multiple regression analysis,
Simms, L. E., V. A. Pilipenko, M. J. Engebretson, G. D. Reeves, A. J. Smith, M. Clilverd (2014),
J. Geophys. Res., 119 p. 7297–7318,
10.1002/2014ja019955.