Desai, M. I., Mason, G. M., Müller-Mellin, R., Korth, A., Mall, U., Dwyer, J. R., et al. (2008). The spatial distribution of upstream ion events from the Earth's bow shock measured by ACE, Wind, and STEREO. Journal Geophysical Research, 113: A08103. doi:10.1029/2007JA012909.