CZ:Ref:DOI:10.1093/brain/103.2.221


 * A well-cited paper concluding that


 * 1) "The intrinsic structure of the neocortex is basically more uniform than has been thought and that differences in cytoarchitecture and function reflects differences in connections."
 * 2) The cerebral cortex is organized in columns
 * 3) The number of neurons underneath equally sized patches of cortical surface area is approximately identical (around 147,000 per $$mm^2$$) across mammalian species, with the exception of the primary visual cortex in primates.
 * Point number 3 has been refuted by a number of studies (e.g. Herculano-Housel et al., 2008), as summarized by Rakic 2008.