Numbers, densities, and colocalization of AMPA- and NMDA-type glutamate receptors at individual synapses in the superficial spinal dorsal horn of rats
M. Antal, Y. Fukazawa, M. Eördögh, D. Muszil, E. Molnár, M. Itakura, M. Takahashi, R. Shigemoto, Journal of Neuroscience 28 (2008) 9692–9701.