1. Butler, I. J., Koslow, S. H., Krumholz, A., Holtzman, N. A. and Kaufman, S. A disorder of biogenic amines in dihydropteridine reductase deficiency.Ann Neurol. 3 (1978) 224–230
2. Curtius, H.-Ch., Niederwieser, A., Viscontini, M., Otten, A., Schaub, J., Scheibenreiter, S. and Schmidt, H. Atypical phenylketonuria due to tetrahydrobiopterin deficiency. Diagnosis and treatment with tetrahydrobiopterin, dihydrobiopterin and sepiapterin.Clin. Chim. Acta 93 (1979) 251–262
3. Danks, D. M., Cotton, R. G. H. and Schlesinger, B. Tetrahydrobiopterin treatment of variant form of phenylketonuria.Lancet 11 (1975) 1043 (letter)
4. Enders, W., Niederwieser, A., Curtius, H.-Ch., Wang, M., Ohrt, B. and Schaub, J. Atypical phenylketonuria due to biopterin deficiency. Early treatment with tetrahydrobiopterin and neurotransmitter precursors, trials of tetrahydrobiopterin monotherapy.Helv. Paediatr. Acta 37 (1982) 489–498
5. Harpey, J.-P. Les défauts de synthèse des bioptérines. Les déficits complets (réductase et synthètase).Arch. Fr. Pédiatr. Suppl. 1 40 (1983) 231–235