1. Pterin-6-aldehyde, a cancer cell catabolite: identification and application in diagnosis and treatment of human cancer;Halpern,1977
2. Folate and pterin metabolism by cancer cells in culture;Stea;Cancer Res.,1978
3. Biopterin content of human neuroblastoma cells in culture;Albrecht;Res. Commun. Chem. Pathol. Pharmacol.,1978
4. On the levels of phenylalanine, tyrosine and tetrahydrobiopterin in the blood of tumor-bearing organisms;Kokolis;Cancer Biochem. Biophys.,1977
5. Enhanced urinary excretion of 7,8-dihydro-6-hydroxylumazine by mice bearing the Ehrlich ascites tumour;Wachter;Cancer Lett.,1979