Rouillard, A. P., Davies, J. A., Forsyth, R. J., Savani, N. P., Sheeley, N. R., Thernisien, A., et al. (2009). A solar storm observed from the Sun to Venus using the STEREO, Venus Express, and MESSENGER spacecraft. Journal Geophysical Research, 114: A07106. doi:10.1029/2008JA014034.