Boumans, T., Theunissen, F. E., Poirier, C., & van der Linden, A. (2007). Neural
representation of spectral and temporal features of song in the auditory forebrain of zebra finches as revealed by functional
MRI. European Journal of Neuroscience: European Neuroscience Association, 26(9),
2613-2626. doi:10.1111/j.1460-9568.2007.05865.x.