1. T. G. Borovskaya, O. P. Loskutova, O. I. Epstein, Byull. Eksp. Biol. Med., Suppl. 3, 52–53 (2001).
2. O. I. Epstein, Ultralow Doses (History of One Investigation) [in Russian], Moscow (2008).
3. A. Agmo, Brain Res. Brain Res. Protoc., 1, No. 2, 203–209 (1997).
4. A. Agmo, A. L. Turi, E. Ellingsen, H. Kaspersen, Pharmacol. Biochem. Behav., 78, No. 3, 379–404 (2004).
5. G. Bermant, B. D. Sachs, Perspectives on Animal Behaviour: A First Course / Ed. G. Bermant. Glenview, IL: Scott, Foresman (1973) pp. 194–238.