Natt, O., Watanabe, T., Boretius, S., Frahm, J., & Michaelis, T. (2003). Magnetization transfer MRI of mouse brain reveals areas of high neural density. Magnetic Resonance Imaging, 21(10), 1113-1120. Retrieved from http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T9D-4BDRPJ5-2-S&_cdi=5112&_user=38661&_pii=S0730725X03003229&_orig=search&_coverDate=12%2F31%2F2003&_sk=999789989&view=c&wchp=dGLzVlz-zSkzk&md5=d9684440f1df9a58a8cab3af08a51c45&ie=/sdarticle.pdf.