1. L. Danziger and G. L. Elmergreen, “Mathematical theory of periodic relapsing catatonia,” Bull. Math. Biophys.,16, 15–21 (1954).
2. L. Danziger and G. L. Elmergreen, “Mathematical models of endocrine systems,” Bull. Math. Biophys.,19, 9–18 (1957).
3. L. Danziger and G. L. Elmergreen, “Mechanism of periodic catatonia,” Continua Neurologica,18, 159–166 (1958).
4. A. Kh. Mirkhodzhaev, Yu. N. Shvetsov, and V. Oravets, “Possibilities of the method of mathematical modeling in the study of regulation of the content of thyroid hormores in an organism,” Probl. Endokrinologii,25, No. 4, 86–91 (1979).
5. Yu. S. Kolesov and D. I. Shvitra, Autooscillations in Systems with Delay [in Russian], Mokslas, Vilnius (1979).