Boumans, T., Gobes, S. M., Poirier, C., Theunissen, F. E., Vandersmissen, L., Pintjens, W., et al. (2008).
Functional MRI of auditory responses in the zebra finch forebrain reveals a hierarchical organisation based on signal strength
but not selectivity. PLoS One, 3(9): e3184. doi:10.1371/journal.pone.0003184.