1. Umezawa H. Enzyme Inhibitors of Microbial Origin. University of Tokyo Prees, Tokyo 1972: 1–114.
2. Aoyagi T, Umezawa H. Structures and activities of protease inhibitors of microbial origin. In: Reich E, Rifkin D, Shaw E, eds. Proteaseases and Biological Control. Cold Spring Harbor Laboratory, 1975: 429–454.
3. Aoyagi T, Ishizuka M, Takeuchi T et al. Enzyme inhibitors in relation to cancer therapy. Jap J Antibiotics (Suppl) 1977; 30-S:121–132.
4. Aoyagi T. Bioactive peptides produced by microorganisms. In: Umezawa H, Shiba T, Takita T, eds. Kodansha Scientific Press, 1978: 129–151.
5. Aoyagi T, Umezawa H. Industrial and clinical enzymology. In: Vitale L, Simeon V, eds. FEBS Federation of European Biochemical Societies. 61. Oxford and New York: Pergamon Press, 1980: 89–91.