1. Anokhin P.K. Printsipialânye voprosy obshchei teorii funktsionalânykh sistem [Principal questions of general theory of functional systems]. In Printsipy sistemnoi organizatsii funktsii [Principles of systemic organization of functions]. Moscow: Publ. Nauka, 1973, pp. 5â61.
2. Bower T.G.R. Psikhicheskoe razvitie mladentsa [Development in infancy]. Moscow: Publ. Progress, 1985.
3. Atkinson R.L. et al. Vvedenie v psikhologiyu [Introduction to Psychology]. Saint Petersburg: Publ. Prime-Euroznak, 2007.
4. Vygotskii L.S. Problema vozrasta [Problem of age]. In Vygotskii L.S. Sobranie sochinenii v 6 tomakh [Collected works in 6 volumes]. Vol. 4, pp. 244â268. Moscow: Publ. Pedagogika, 1984.
5. Vygotskii L.S. Istoriya razvitiya vysshikh psikhicheskikh funktsii [History of the development of higher mental functions] In Sobranie sochinenii v 6 tomakh [Collected works in 6 volumes]. Vol. 3. Moscow: Publ. [Pedagogika], 1983.