1. Elkonin, D.B.: The Psychology of the Game. 2nd edn. Vlados, Moscow (1999)
2. Caillois, R.: Les jeux et les Hommes: Le masque et le vertige. Gallimard, Paris (1958)
3. Vygodsky, L.S.: Play and its role in the mental development of the child. Issues Psychol. 6, 62–68 (1966)
4. Vygotsky, L.S.: Game and its role in the mental development of the child. In: Psychology of Development, pp. 56–79. Peter, St. Petersburg (2001). [in Rus.]
5. Leontiev, A.N.: Psychological foundations of preschool games. In: Rubtsov, V.V., Margolis, A.A., Guruzhapov, V.A. (eds.) Psychological Science and Education, p. 19. Smysl, Moscow (1996). [in Rus.]