Electrostatic Turbulence and Debye-scale Structures in Collisionless Shocks - Wang, R; Vasko, IY; Mozer, FS; Bale, SD; Artemyev, AV; Bonnell, JW; Ergun, R; Giles, B; Lindqvist, P-A; Russell, CT; Strangeway, R (ASTROPHYSICAL JOURNAL LETTERS, 2020)