1. G. I. Chipens, L. K. Polevaya, N. I. Veretennikova, and A. Yu. Krikis, Structures and Functions of Low-Molecular-Weight Peptides [in Russian], Zinatne, Riga (1980).
2. S. G. Galaktionov, G. V. Nikiforovich, G. I. Chipens, and M. D. Shenderovich, Angiotensin. Molecular Mechanisms of Its Action [in Russian], Zinatne, Riga (1979).
3. A. A. Klesov and I. V., Berezin, Enzymatic Catalysis [in Russian], Izd. MGU, Moscow (1980).
4. L. Webb, Enzyme and Metabolic Inhibitors, Academic Press (1966).
5. Z. P. Horowitz, Angiotensin-Converting Enzyme Inhibitors: Mechanisms of Action and Clinical Implications, Baltimore, Maryland (1981), p. 451.