Griffiths, T D; Kumar, S; Warren, J D; Stewart, L; Stephan, K E; Friston, K J (2007). Approaches to the cortical analysis of auditory objects. Hearing Research, 229(1-2):46-53.
Kumar, S; Stephan, K E; Warren, J D; Friston, K J; Griffiths, T D (2007). Hierarchical processing of auditory objects in humans. PLoS Computational Biology, 3(6):e100.