Trattner, K. J., Fuselier, S. A., Yeoman, T. K., Carlson, C., Peterson, W. K., Korth, A., et al. (2005). Spatial and temporal cusp structures observed by multiple spacecraft and ground based observations. Surveys in Geophysics, 26, 281-305. doi:10.1007/s10712-005-1883-3.