Pietz, J., Kreis, R., Rupp, A., Mayatepek, E., Rating, D., Boesch, C., & Bremer, H. J. (1999). Large neutral amino acids block phenylalanine transport into brain tissue in patients with phenylketonuria. American Society for Clinical Investigation.

Pietz, Joachim, Roland Kreis, André Rupp, Ertan Mayatepek, Dietz Rating, Chris Boesch, ja Hans Joachim Bremer. Large Neutral Amino Acids Block Phenylalanine Transport Into Brain Tissue in Patients With Phenylketonuria. American Society for Clinical Investigation, 1999.

Pietz, Joachim, et al. Large Neutral Amino Acids Block Phenylalanine Transport Into Brain Tissue in Patients With Phenylketonuria. American Society for Clinical Investigation, 1999.