Bick, U., Ullrich, K., Stöber, U., Möller, H. E., Schuierer, G., Ludolph, A. C., et al. (1993).
White matter abnormalities in patients with treated hyperphenylalaninemia: Magnetic resonance relaxometry and proton spectroscopy
findings. European Journal of Pediatrics, 152(12), 1012-1020.
doi:10.1007/BF01957228.