1. Novel urinary metabolites of folic acid in the rat;Barford,1975
2. Erhöhte Ausscheidung einer fluoreszierenden Substant im Harn Ehrlich-Ascites-Tumor tragender Mäuse;Gantner;Mikrochim. Acta (Wien),1977
3. Pterin-6-aldehyde, a cancer cell catabolite: Identification and application in diagnosis and treatment of human cancer;Halpern,1977
4. Pteridine cofactors;Kaufman;Ann. Rev. Biochem.,1967
5. On the levels of phenylalanine, tyrosine and tetra-hydrobiopterine in blood of tumour-bearing organisms;Kokolis;Cancer Biochem. Biophys.,1977