Objective evidence of cognitive complaints in Chronic Fatigue Syndrome: A BOLD fMRI study of verbal working memory. - Gudrun Lange; Jason Steffener; Dane B. Cook; Benjamin Martin Bly; Christopher Christodoulou; Wen-Ching Liu; John DeLuca; Benjamin H. Natelson (NeuroImage, 2005)

Functional neuroimaging correlates of mental fatigue induced by cognition among chronic fatigue syndrome patients and controls. - Dane B. Cook; Patrick J. O'Connor; Gudrun Lange; Jason Steffener (NeuroImage, 2007)