Imaging the Enzymatic Digestion of Bacterial Cellulose Ribbons Reveals the Endo Character of the Cellobiohydrolase Cel6A from<i>Humicola insolens</i>and Its Mode of Synergy with Cellobiohydrolase Cel7AClaire Boisset, H. Chanzy, Martin Schülein et al.|Applied and Environmental Microbiology|2000Cited by 216