Singer, W. Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Max Planck Society;
http://www.ncbi.nlm.nih.gov/pubmed/26142463 (Any fulltext)
Mayer, A., Schwiedrzik, C. M., Wibral, M., Singer, W., & Melloni, L. (2016). Expecting to See a Letter: Alpha Oscillations as Carriers of Top-Down Sensory Predictions. Cerebral Cortex, 26(7), 3146-3170. doi:10.1093/cercor/bhv146.