Autogenous and efficient acceleration of energetic ions upstream of Earth's bow shock - Turner, DL; Wilson, LB; Liu, TZ; Cohen, IJ; Schwartz, SJ; Osmane, A; Fennell, JF; Clemmons, JH; Blake, JB; Westlake, J; Mauk, BH; Jaynes, AN; et al. (NATURE, 2018)