1. G. Weber, Biochemical Strategy of Cancer Cells and the Design of Chemotherapy, G. H. A. Clowes Memorial Lecture, Cancer Res. 43: 3466 (1983).
2. D. A. Matthews, R. A. Alden, J. T. Bolin, D. J. Filman, S. T. Freer, N. Xuong, and J. Kraut, X-ray Structural Studies of Dihydrofolate Reductase, in: “Chemistry and Biology of Pteridines,” R. L. Kisliuk and G. M. Brown, eds., Elsevier, New York (1979).
3. J. A. Montgomery, Has the Well Gone Dryp, Cain Memorial Lecture, Cancer Res. 42: 3911 (1982).
4. G. Weber, ed., “Advances in Enzyme Regulation,” Volume 24, Pergamon Press, Oxford (1986).
5. A. Goldin, Studies with High Dose Methotrexate-Historical Background, Cancer Treat. Rep. 62: 307 (1978).