1. Nitric oxide synthase structure and mechanism
2. The hyperphenylalaninemias;Scriver,1995
3. Defects in metabolism of aminoacids;Rezvani,1996
4. Plasma tetrahydrobiopterin and its pharmacokinetic following oral administration
5. M. Martinez Pardo, A. Bélanger Quintana, M.J. García Muñoz, L. Desviat, B. Pérez, M. Ugarte, In.: http://www.ae3com.org/recursos-protocolo.php, Edit.: Asociación Española para el estudio de los errores congenitos del metabolismo (AECOM), 2008.