High-frequency (600 Hz) population spikes in human EEG delineate thalamic and cortical fMRI activation sites. - Petra Ritter; Frank Freyer; Gabriel Curio; Arno Villringer (NeuroImage, 2008)

Ultrahigh-frequency EEG during fMRI: Pushing the limits of imaging-artifact correction. - Frank Freyer; Robert Becker; Kimitaka Anami; Gabriel Curio; Arno Villringer; Petra Ritter (NeuroImage, 2009)

A Canonical Model of Multistability and Scale-Invariance in Biological Systems. - Frank Freyer; James A. Roberts 002; Petra Ritter; Michael Breakspear (PLoS Comput. Biol., 2012)