Bussiére, T., Gold, Kövari, E., Giannakopoulos, P., Bouras, C., Perl, D.P., Morrison, J.H. y Hof, P.R. (2003).Stereologic analysis of neurofibrillary tangle formation in prefrontal cortex area 9 in aging and alzheimer´s disease.Neuroscience, 117(3), 577–592. doi: 10.1016/ S0306-4522(02)00942-9