Importance of Bison Restoration (Science Paywalled Paper):

Science (Paywall): Yellowstone's free--moving large bison herds provide a glimpse of their past ecosystem function

Anthropocene: Yellowstone’s bison revival shows the power & complexity of rewilding

Smithsonian: Restoring Bison to Yellowstone Has ‘Reawakened’ the Ecosystem as the Large Animals Migrate, Study Suggests

W&L University: Bison Restoration Study